ci(quality): 后端测试 - 备齐 Postgres/Redis 依赖并禁止依赖用例静默跳过 (#571)

Original-Commit: 6bc6d5701f461a7306fd8171e18968c95d7da124
ci(quality): 后端测试 - 备齐 Postgres/Redis 依赖并禁止依赖用例静默跳过

Backend job 既没有 services 也没有 CANVAS_TEST_POSTGRES_DSN，也没装 redis-server，
于是 5 个用例默认静默跳过：PostgreSQL 迁移、素材字节修复、画布版本历史、Redis 租约、
缓存白名单——这些路径在 CI 上从来没被执行过，而 go test ./... 是全绿的。

- 起 postgres:16-alpine service（pg_isready 健康检查）+ 导出 CANVAS_TEST_POSTGRES_DSN；
- 安装 redis-server 可执行文件（用例自起临时实例）并停掉系统服务；
- 新增守卫：单独跑这 5 个用例，出现 --- SKIP 就 ::error:: 并失败；
- 保留既有的 go test -json | tee 与 timings artifact 上传。

.github/workflows/quality.yml

@@ -14,6 +14,24 @@ jobs:
     defaults:
       run:
         working-directory: backend
+    # 后端有 5 个用例默认会静默跳过：3 个需要 CANVAS_TEST_POSTGRES_DSN（PostgreSQL 迁移、
+    # 素材字节修复、画布版本历史），2 个用 exec.LookPath("redis-server") 自起临时实例
+    # （Redis 租约、缓存白名单）。只跑 go test ./... 而不备齐这两样，这些路径永远不会被执行。
+    services:
+      postgres:
+        image: postgres:16-alpine
+        env:
+          POSTGRES_PASSWORD: canvas_test
+          POSTGRES_DB: canvas_test
+        ports:
+          - 5432:5432
+        options: >-
+          --health-cmd "pg_isready -U postgres"
+          --health-interval 5s
+          --health-timeout 5s
+          --health-retries 12
+    env:
+      CANVAS_TEST_POSTGRES_DSN: postgres://postgres:canvas_test@127.0.0.1:5432/canvas_test?sslmode=disable
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
@@ -21,6 +39,12 @@ jobs:
           go-version-file: backend/go.mod
           cache-dependency-path: backend/go.sum
           cache: true
+      - name: Install redis-server for integration tests
+        # 用例自己拉起临时 redis-server（unix socket），所以需要的是可执行文件而不是 redis 服务。
+        run: |
+          sudo apt-get update -qq
+          sudo apt-get install -y -qq redis-server
+          sudo systemctl stop redis-server || true
       - name: Check formatting
         run: test -z "$(gofmt -l .)"
       - name: Run Go tests
@@ -28,6 +52,17 @@ jobs:
         run: |
           set -o pipefail
           go test -json ./... | tee "$RUNNER_TEMP/go-tests.jsonl"
+      - name: Ensure dependency-backed tests were not skipped
+        shell: bash
+        run: |
+          set -o pipefail
+          go test ./internal/database/ ./internal/canvas/ ./internal/repository/ ./internal/platform/ ./internal/app/ \
+            -run 'TestPostgresAssetIDMigration|TestRepairAssetBytesPostgres|TestCanvasRevision|TestRuntimeCoordinatorRedisLeasePreservesLongestTTL|TestClearAdminRuntimeCacheUsesRedisWhitelist' \
+            -count=1 -v | tee "$RUNNER_TEMP/dependency-tests.log"
+          if grep -q -- "--- SKIP" "$RUNNER_TEMP/dependency-tests.log"; then
+            echo "::error::依赖外部服务的用例被跳过：请检查 CANVAS_TEST_POSTGRES_DSN 与 redis-server"
+            exit 1
+          fi
       - name: Upload Go test timings
         if: always()
         uses: actions/upload-artifact@v4