fix(ci): B5 用 docker inspect 取 postgres container IP，不用 127.0.0.1

Gitea runner 在 docker 內，port binding 到 127.0.0.1:15432 無法從 runner 連到
改用 docker inspect 取 container 真實 IP，直連 5432

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

.gitea/workflows/cd.yaml

@@ -133,7 +133,11 @@ jobs:
           docker compose -f docker-compose.test.yml exec -T postgres-test \
             psql -U awoooi -d awoooi_test \
             -f /dev/stdin < tests/integration/setup_test_schema.sql
-          TEST_DATABASE_URL="postgresql+asyncpg://awoooi:awoooi_test_2026@127.0.0.1:15432/awoooi_test?ssl=disable" \
+          # 取得 postgres container 的實際 IP (runner 在 docker 內，127.0.0.1 不可靠)
+          PG_IP=$(docker inspect api-postgres-test-1 \
+            --format '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}')
+          echo "postgres-test IP: $PG_IP"
+          TEST_DATABASE_URL="postgresql+asyncpg://awoooi:awoooi_test_2026@${PG_IP}:5432/awoooi_test?ssl=disable" \
             /opt/api-venv/bin/pytest tests/integration/test_b5_core_flows.py -v --tb=short
           TEST_EXIT=$?
           docker compose -f docker-compose.test.yml down -v 2>/dev/null || true