test(vet): add failing case for anonymous-parameter rule

Test currently fails because vetQuery does not yet populate the new
Parameter.name field, so named params are wrongly flagged as anonymous.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: JasonDav

internal/endtoend/testdata/vet_anonymous_params/exec.json

@@ -0,0 +1,3 @@
+{
+  "command": "vet"
+}

internal/endtoend/testdata/vet_anonymous_params/query.sql

@@ -0,0 +1,7 @@
+-- name: ListByIDs :many
+SELECT id FROM bar
+WHERE id = ANY($1::bigint[]);
+
+-- name: GetByID :one
+SELECT id FROM bar
+WHERE id = $1;

internal/endtoend/testdata/vet_anonymous_params/schema.sql

@@ -0,0 +1 @@
+CREATE TABLE bar (id bigserial NOT NULL);

internal/endtoend/testdata/vet_anonymous_params/sqlc.yaml

@@ -0,0 +1,16 @@
+version: 2
+sql:
+  - schema: "schema.sql"
+    queries: "query.sql"
+    engine: "postgresql"
+    gen:
+      go:
+        package: "querytest"
+        out: "db"
+    rules:
+      - no-anonymous-params
+rules:
+  - name: no-anonymous-params
+    message: "query has an anonymous parameter; name it with sqlc.arg() or @name"
+    rule: |
+      query.params.exists(p, p.name == "")

internal/endtoend/testdata/vet_anonymous_params/stderr.txt

@@ -0,0 +1 @@
+query.sql: ListByIDs: no-anonymous-params: query has an anonymous parameter; name it with sqlc.arg() or @name