fix(ci): B5 改用 Gitea Actions services: — 正確的 service container 架構

之前所有方案都在對抗 DinD 網路隔離，根本解法是用 services:
services.postgres-test 與 runner 同網路，localhost:15432 直連
不再需要 docker compose、docker cp、network connect 等 workaround

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/cd.yaml

@@ -47,6 +47,21 @@ jobs:
     # 2026-04-02 Claude Code: 加入 timeout 防止 docker build/push 卡住超過 45 分鐘
     timeout-minutes: 45
     runs-on: ubuntu-latest
+    # B5 整合測試用 service container — 與 runner 同網路，localhost:15432 可用
+    services:
+      postgres-test:
+        image: pgvector/pgvector:pg16
+        env:
+          POSTGRES_DB: awoooi_test
+          POSTGRES_USER: awoooi
+          POSTGRES_PASSWORD: awoooi_test_2026
+        ports:
+          - 15432:5432
+        options: >-
+          --health-cmd "pg_isready -U awoooi -d awoooi_test"
+          --health-interval 5s
+          --health-timeout 3s
+          --health-retries 10
     steps:
       - uses: actions/checkout@v4
 
@@ -124,32 +139,17 @@ jobs:
           exit $PYTEST_EXIT
 
       # ── 整合測試 B5 (2026-04-10) ──────────────────────────────────────────
-      # --network container:postgres-test 共享網路命名空間，localhost:5432 = postgres
+      # B5 整合測試 — postgres-test 由 services: 提供，localhost:15432 直連
       - name: Integration Tests (B5 — 真實 DB)
-        continue-on-error: true
         run: |
           cd apps/api
-          docker compose -f docker-compose.test.yml up -d --wait
-          docker compose -f docker-compose.test.yml exec -T postgres-test \
-            psql -U awoooi -d awoooi_test \
-            < tests/integration/setup_test_schema.sql
-          PG_CONTAINER=$(docker ps --filter name=postgres-test --format '{{.Names}}' | head -1)
-          echo "postgres container: $PG_CONTAINER"
-          # DinD: volume mount 不可靠，用 docker cp 把代碼放進臨時 container
-          # 共享 postgres container 網路命名空間，localhost:5432 直連
-          PYTEST_CTR=$(docker create \
-            --network "container:${PG_CONTAINER}" \
-            -w /workspace \
-            -e TEST_DATABASE_URL="postgresql+asyncpg://awoooi:awoooi_test_2026@localhost:5432/awoooi_test?ssl=disable" \
-            python:3.11-slim \
-            sh -c "pip install -q uv && uv pip install -q --system -e '.[dev]' && pytest tests/integration/test_b5_core_flows.py -v --tb=short")
-          docker cp . "$PYTEST_CTR:/workspace"
-          docker start -a "$PYTEST_CTR"
-          TEST_EXIT=$?
-          docker rm "$PYTEST_CTR" 2>/dev/null || true
-          TEST_EXIT=$?
-          docker compose -f docker-compose.test.yml down -v 2>/dev/null || true
-          exit $TEST_EXIT
+          # 初始化 schema (用 docker exec 進 service container)
+          PG_CTR=$(docker ps --filter name=postgres-test --format '{{.Names}}' | head -1)
+          docker exec -i "$PG_CTR" \
+            psql -U awoooi -d awoooi_test < tests/integration/setup_test_schema.sql
+          # 跑測試 — service container 在同網路，localhost:15432 可連
+          TEST_DATABASE_URL="postgresql+asyncpg://awoooi:awoooi_test_2026@localhost:15432/awoooi_test?ssl=disable" \
+            /opt/api-venv/bin/pytest tests/integration/test_b5_core_flows.py -v --tb=short
 
       - name: Login to Harbor
         uses: docker/login-action@v3