feat(ddgr): add dashboard support

[wdhif]

What does this PR do?

Adds dashboard as a supported resource type in the DatadogGenericResource CRD, allowing users to manage Datadog Dashboards declaratively via a Kubernetes CR with a raw JSON spec.

Motivation

The DatadogGenericResource CRD gives users full flexibility over the dashboard payload via jsonSpec.

Additional Notes

Minimum Agent Versions

N/A, this is an Operator-only change with no Agent or Cluster Agent dependency.

Describe your test plan

Tested end-to-end on a local minikube cluster

• Deploy the Opeator
• Deploy the following configuration

apiVersion: datadoghq.com/v1alpha1
  kind: DatadogGenericResource
  metadata:
    name: ddgr-test-dashboard
    namespace: default
  spec:
    type: dashboard
    jsonSpec: |
      {
        "title": "DDGR Test Dashboard",
        "layout_type": "ordered",
        "widgets": [
          {
            "definition": {
              "type": "timeseries",
              "title": "CPU Usage",
              "requests": [
                {
                  "q": "avg:system.cpu.user{*}",
                  "display_type": "line"
                }
              ]
            }
          }
        ]
      }

• Validate that the dashboard has been created.
• Delete the resource and validate that the dashboard has been deleted.

Also validated with unit tests.

Checklist

• PR has at least one valid label: bug, enhancement, refactoring, documentation, tooling, and/or dependencies
• PR has a milestone or the qa/skip-qa label
• All commits are signed (see: signing commits)

[codecov-commenter]

Codecov Report

❌ Patch coverage is 22.22222% with 42 lines in your changes missing coverage. Please review.
✅ Project coverage is 39.99%. Comparing base (56159c6) to head (9aa31b0).

Files with missing lines	Patch %	Lines
...al/controller/datadoggenericresource/dashboards.go	16.66%	40 Missing ⚠️
pkg/datadogclient/client.go	0.00%	2 Missing ⚠️

❌ Your patch status has failed because the patch coverage (22.22%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2906      +/-   ##
==========================================
- Coverage   40.03%   39.99%   -0.04%     
==========================================
  Files         319      320       +1     
  Lines       28066    28120      +54     
==========================================
+ Hits        11235    11247      +12     
- Misses      16008    16050      +42     
  Partials      823      823              

Flag	Coverage Δ
unittests	39.99% <22.22%> (-0.04%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...al/controller/datadoggenericresource/controller.go	53.90% <100.00%> (+0.73%)	⬆️
...nternal/controller/datadoggenericresource/utils.go	86.44% <100.00%> (+0.47%)	⬆️
pkg/datadogclient/client.go	0.00% <0.00%> (ø)
...al/controller/datadoggenericresource/dashboards.go	16.66% <16.66%> (ø)

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[Copilot]

Pull request overview

Adds Datadog Dashboard support to the DatadogGenericResource (DDGR) flow so dashboards can be managed declaratively via spec.type=dashboard and a raw JSON payload in spec.jsonSpec.

Changes:

• Extend DDGR supported resource types to include dashboard (API types, validation, CRD schemas).
• Add a DashboardHandler wired into the DDGR controller dispatch and Datadog generic client.
• Add unit tests for dashboard status population and handler selection.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
pkg/datadogclient/client.go	Adds DashboardsApi to the generic Datadog client initialization and struct.
internal/controller/datadoggenericresource/controller.go	Wires the dashboards client into the reconciler and credential refresh path.
internal/controller/datadoggenericresource/utils.go	Routes spec.type=dashboard to the new DashboardHandler.
internal/controller/datadoggenericresource/dashboards.go	Implements create/get/update/delete operations for dashboards and status population.
internal/controller/datadoggenericresource/dashboards_test.go	Adds unit tests for dashboard status updates and handler selection.
api/datadoghq/v1alpha1/datadoggenericresource_types.go	Adds the Dashboard enum value and updates kubebuilder validation enum.
api/datadoghq/v1alpha1/datadoggenericresource_validation.go	Allows dashboard as a valid DDGR resource type.
config/crd/bases/v1/datadoghq.com_datadoggenericresources.yaml	Adds dashboard to the CRD enum list (YAML).
config/crd/bases/v1/datadoghq.com_datadoggenericresources_v1alpha1.json	Adds dashboard to the CRD enum list (JSON).

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