TRT-2364: Fix timestamp and date type inconsistencies

.apm/instructions/backend.instructions.md

@@ -10,3 +10,9 @@ applyTo: "**/*.go"
   counts, a log.WithField() call is preferred over formatting values into a string.
 * After making changes, always run `gofmt -w` on modified files to ensure proper formatting.
 * When modifying any data provider (BigQuery or PostgreSQL), ensure **parity between both implementations**. Changes to query logic, filtering, or returned data in one provider must be reflected in the other.
+* **Timestamps and dates**: Use proper types, never epoch integers.
+  - PostgreSQL columns: use `TIMESTAMP WITH TIME ZONE` for timestamps and `DATE` for date-only values. All timestamps are UTC.
+  - Go structs: use `time.Time` for timestamps. Use `civil.Date` (`cloud.google.com/go/civil`) for date-only values (e.g., GA dates, development start dates). Do not use `string` for date or timestamp fields; let JSON marshaling produce the correct format.
+  - API responses: timestamps serialize as RFC 3339 strings, dates as `YYYY-MM-DD` strings. Never return epoch millisecond integers. Never manually format with `time.Format()` into a string field.
+  - Materialized views: project timestamp columns directly from the source table. Do not convert to epoch with `EXTRACT(epoch FROM ...)`.
+  - GORM model tags: include `gorm:"type:date"` on date-only columns so GORM and migrations use the correct PostgreSQL type.

.apm/instructions/frontend.instructions.md

@@ -14,3 +14,10 @@ npx prettier --write .
 * Keep UI elements consistent with Material-UI standards.
 
 The frontend uses `npm`. If you must install or update any dependencies, always use the `--ignore-scripts` flag.
+
+* **Timestamps and dates from the API**:
+  - Timestamps arrive as RFC 3339 strings (e.g., `"2024-06-27T15:30:00Z"`), not epoch millisecond integers. Use `new Date(value)` or `Temporal.Instant.from(value)` to parse them.
+  - Dates arrive as `YYYY-MM-DD` strings (e.g., `"2024-06-27"`). Use `Temporal.PlainDate.from(value)` for date arithmetic.
+  - For MUI DataGrid timestamp columns, use `type: 'date'` with a `valueGetter` that returns a `Date` object. Do not return epoch milliseconds from `valueGetter`.
+  - For filter values sent to the API, use ISO 8601 strings (e.g., `new Date(...).toISOString()`), not epoch millisecond integers.
+  - For day-level bucketing or date arithmetic, prefer `Temporal.PlainDate` over `Date` with manual millisecond math.

apm.lock.yaml

@@ -104,10 +104,10 @@ local_deployed_file_hashes:
   .claude/commands/sippy-generate-release-views.md: sha256:eb4c9eeeea2ab2a90e8a8839147d8a1a309ea6ce3dafd397c6d2485c93068a9a
   .claude/commands/sippy-update-ga-release-views.md: sha256:4a5589bacc05127e427a2de4d34a8f13e05e297bdf6ebf7473c9e71f47a6b4f4
   .claude/commands/sippy-update-job-variant.md: sha256:f88742dddeec5024931959a8330fdce362ffdd9b8825e808830ac346605cbd16
-  .claude/rules/backend.md: sha256:b1bd6bacccc8bfc8ab2c060496fede3bdcece46b59cf218cd7cddc3617ead4c5
+  .claude/rules/backend.md: sha256:7b954581d356fb4f0d4ff966d774739847c1cf5e0ec60c29cb7c730a1b3966f0
   .claude/rules/config.md: sha256:96c5e42c039230f1e4e7f9ba56d04e6f76f23deeecdd858634c440d6029a6a83
   .claude/rules/dev-commands.md: sha256:eb32bdc640add2044138807572ea1afb73ee1bba038f5098032a89987a7ddc04
-  .claude/rules/frontend.md: sha256:ff22046c5b951769218bbdf36499e67c70896811b8ef161ca6d3729a3423997d
+  .claude/rules/frontend.md: sha256:cdfc2cdc3981c43d91dcf9583d0fff2d3f0b4f355ded4237aa264211fe42600c
   .claude/rules/general.md: sha256:997f68e86cb43485ec5f108be3417f9bbb43ae1faffd660d598f18260f5df3ce
   .claude/rules/mcp.md: sha256:ddfe965e7cf8cddbba1374c6ae582a20ac0af17c958bf10e1a4edff6ff2ad0b8
   .claude/rules/testing.md: sha256:52bfc6e67b38d17b767d34c480530cd14c700ef8018d5c70c2deaa7133717904
@@ -124,10 +124,10 @@ local_deployed_file_hashes:
   .cursor/commands/sippy-generate-release-views.md: sha256:eb4c9eeeea2ab2a90e8a8839147d8a1a309ea6ce3dafd397c6d2485c93068a9a
   .cursor/commands/sippy-update-ga-release-views.md: sha256:4a5589bacc05127e427a2de4d34a8f13e05e297bdf6ebf7473c9e71f47a6b4f4
   .cursor/commands/sippy-update-job-variant.md: sha256:f88742dddeec5024931959a8330fdce362ffdd9b8825e808830ac346605cbd16
-  .cursor/rules/backend.mdc: sha256:5ff740fc76c25ee64beb7f768399da6ef6510ecca8147e5c2f81fbb110043084
+  .cursor/rules/backend.mdc: sha256:9a3b22b249269e105a3958ac7a7fa8e78b5426347239c02567116f1acbf77ca1
   .cursor/rules/config.mdc: sha256:d6e2195399bbb26a3fef7e54bd01862ffce39d89dce8aabdb0b89c89028192eb
   .cursor/rules/dev-commands.mdc: sha256:3dc8a3ef5cbb22ebb09b7fe3785f24a32ab2baa4488c5514c9c6210b0af6c4eb
-  .cursor/rules/frontend.mdc: sha256:497f39372724f1ae127181fe3dac9ea9a95a51c532b68ccfee6080832cf9c556
+  .cursor/rules/frontend.mdc: sha256:6cbbb94363b782dc6763344a72f5a996fe25a4bd5db08862e578b611ed083612
   .cursor/rules/general.mdc: sha256:5bc6e1e12d53d85656248c9dc1239c74bcc0df29d5987f3b08e3d79e3df413b7
   .cursor/rules/mcp.mdc: sha256:c02472afd46e4c89f71d4487dcd5da98b0c1bcbcf7f9cbc4d7ed4e7d3a206ec1
   .cursor/rules/testing.mdc: sha256:12ea7763599eb56fdd92ae09a9fed19495b17673ee34701803a6eae7ac50d3e8

pkg/api/README.md

@@ -294,95 +294,95 @@ A summary of runs for job(s). Results contains of the following values for each
       "name": "periodic-ci-openshift-release-master-nightly-4.9-e2e-metal-ipi-ovn-ipv6",
       "results": [
         {
-          "timestamp": 1628207039000,
+          "timestamp": "2021-08-06T03:43:59Z",
           "result": "F",
           "url": "https://prow.ci.openshift.org/view/gcs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.9-e2e-metal-ipi-ovn-ipv6/1423429598720299008"
         },
         {
-          "timestamp": 1628045973000,
+          "timestamp": "2021-08-04T03:59:33Z",
           "result": "F",
           "url": "https://prow.ci.openshift.org/view/gcs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.9-e2e-metal-ipi-ovn-ipv6/1422754032564310016"
         },
         {
-          "timestamp": 1628198644000,
+          "timestamp": "2021-08-05T21:24:04Z",
           "result": "F",
           "url": "https://prow.ci.openshift.org/view/gcs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.9-e2e-metal-ipi-ovn-ipv6/1423394362347229184"
         },
         {
-          "timestamp": 1628485392000,
+          "timestamp": "2021-08-09T05:03:12Z",
           "result": "F",
           "url": "https://prow.ci.openshift.org/view/gcs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.9-e2e-metal-ipi-ovn-ipv6/1424597097709047808"
         },
         {
-          "timestamp": 1628343908000,
+          "timestamp": "2021-08-07T14:25:08Z",
           "result": "F",
           "url": "https://prow.ci.openshift.org/view/gcs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.9-e2e-metal-ipi-ovn-ipv6/1424003666343366656"
         },
         {
-          "timestamp": 1628325313000,
+          "timestamp": "2021-08-07T09:15:13Z",
           "result": "F",
           "url": "https://prow.ci.openshift.org/view/gcs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.9-e2e-metal-ipi-ovn-ipv6/1423925674229370880"
         },
         {
-          "timestamp": 1628289649000,
+          "timestamp": "2021-08-06T23:20:49Z",
           "result": "F",
           "url": "https://prow.ci.openshift.org/view/gcs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.9-e2e-metal-ipi-ovn-ipv6/1423776089259380736"
         },
         {
-          "timestamp": 1628277370000,
+          "timestamp": "2021-08-06T19:56:10Z",
           "result": "S",
           "url": "https://prow.ci.openshift.org/view/gcs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.9-e2e-metal-ipi-ovn-ipv6/1423724523844276224"
         },
         {
-          "timestamp": 1628358891000,
+          "timestamp": "2021-08-07T18:34:51Z",
           "result": "F",
           "url": "https://prow.ci.openshift.org/view/gcs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.9-e2e-metal-ipi-ovn-ipv6/1424066513538650112"
         },
         {
-          "timestamp": 1628190532000,
+          "timestamp": "2021-08-05T19:08:52Z",
           "result": "F",
           "url": "https://prow.ci.openshift.org/view/gcs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.9-e2e-metal-ipi-ovn-ipv6/1423360364472438784"
         },
         {
-          "timestamp": 1628274962000,
+          "timestamp": "2021-08-06T19:16:02Z",
           "result": "F",
           "url": "https://prow.ci.openshift.org/view/gcs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.9-e2e-metal-ipi-ovn-ipv6/1423714481237659648"
         },
         {
-          "timestamp": 1627391095000,
+          "timestamp": "2021-07-27T13:24:55Z",
           "result": "F",
           "url": "https://prow.ci.openshift.org/view/gcs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.9-e2e-metal-ipi-ovn-ipv6/1420007279679246336"
         },
         {
-          "timestamp": 1627473363000,
+          "timestamp": "2021-07-28T12:16:03Z",
           "result": "F",
           "url": "https://prow.ci.openshift.org/view/gcs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.9-e2e-metal-ipi-ovn-ipv6/1420352338517823488"
         },
         {
-          "timestamp": 1627617630000,
+          "timestamp": "2021-07-30T04:20:30Z",
           "result": "F",
           "url": "https://prow.ci.openshift.org/view/gcs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.9-e2e-metal-ipi-ovn-ipv6/1420957438630170624"
         },
         {
-          "timestamp": 1627515377000,
+          "timestamp": "2021-07-29T00:56:17Z",
           "result": "F",
           "url": "https://prow.ci.openshift.org/view/gcs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.9-e2e-metal-ipi-ovn-ipv6/1420528516700573696"
         },
         {
-          "timestamp": 1627396851000,
+          "timestamp": "2021-07-27T15:00:51Z",
           "result": "F",
           "url": "https://prow.ci.openshift.org/view/gcs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.9-e2e-metal-ipi-ovn-ipv6/1420031423921786880"
         },
         {
-          "timestamp": 1627363991000,
+          "timestamp": "2021-07-27T05:53:11Z",
           "result": "F",
           "url": "https://prow.ci.openshift.org/view/gcs/origin-ci-test/logs/periodic-ci-openshift-release-master-nightly-4.9-e2e-metal-ipi-ovn-ipv6/1419893597473345536"
         }
       ]
     }
   ],
-  "start": 1627317573000,
-  "end": 1628508950000
+  "start": "2021-07-26",
+  "end": "2021-08-09"
 }
 ```
 

pkg/api/componentreadiness/dataprovider/bigquery/releasedates.go

@@ -2,6 +2,7 @@ package bigquery
 
 import (
 	"context"
+	"time"
 
 	"github.com/openshift/sippy/pkg/api"
 	"github.com/openshift/sippy/pkg/apis/api/componentreport/crtest"
@@ -34,9 +35,10 @@ func (c *releaseDateQuerier) QueryReleaseDates(ctx context.Context) ([]crtest.Re
 	for _, release := range releases {
 		timeRange := crtest.ReleaseTimeRange{Release: release.Release}
 		if release.GADate != nil {
-			prior := util.AdjustReleaseTime(*release.GADate, true, "30", c.reqOptions.CacheOption.CRTimeRoundingFactor, c.reqOptions.CacheOption.CRTimeRoundingOffset)
+			gaTime := release.GADate.In(time.UTC)
+			prior := util.AdjustReleaseTime(gaTime, true, "30", c.reqOptions.CacheOption.CRTimeRoundingFactor, c.reqOptions.CacheOption.CRTimeRoundingOffset)
 			timeRange.Start = &prior
-			timeRange.End = release.GADate
+			timeRange.End = &gaTime
 		}
 		timeRanges = append(timeRanges, timeRange)
 	}

pkg/api/componentreadiness/dataprovider/postgres/provider.go

@@ -9,6 +9,7 @@ import (
 	"strings"
 	"time"
 
+	"cloud.google.com/go/civil"
 	"github.com/lib/pq"
 
 	"github.com/openshift/sippy/pkg/api/componentreadiness/dataprovider"
@@ -165,7 +166,7 @@ func (p *PostgresProvider) QueryReleases(ctx context.Context) ([]v1.Release, err
 		v1.SippyClassicCap:       true,
 	}
 
-	now := time.Now().UTC()
+	today := civil.DateOf(time.Now().UTC())
 	var releases []v1.Release
 	for _, name := range releaseNames {
 		rel := v1.Release{
@@ -176,7 +177,7 @@ func (p *PostgresProvider) QueryReleases(ctx context.Context) ([]v1.Release, err
 		if meta, ok := releaseMetadata[name]; ok {
 			rel.PreviousRelease = meta.previousRelease
 			if meta.gaOffsetDays != 0 {
-				ga := now.AddDate(0, 0, meta.gaOffsetDays)
+				ga := today.AddDays(meta.gaOffsetDays)
 				rel.GADate = &ga
 			}
 			if meta.product != "" {