fix(ci): B5 整合測試 postgres IP 解析穩定化

問題: docker inspect 多網路時 {{range}} 拼接多個 IP → asyncpg 逾時
修正: 用 python3 json 解析取第一個網路 IP，
     container name 動態查詢 (filter name=postgres-test)，
     fallback 到 127.0.0.1:15432 (host exposed port)

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

.gitea/workflows/cd.yaml

@@ -133,11 +133,22 @@ 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
-          # 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" \
+          # 取得 postgres container IP: 找 api_ 開頭的 compose 網路，取第一個有效 IP
+          # docker inspect 多網路時會拼接，用 json + jq 確保只取一個
+          CONTAINER_NAME=$(docker ps --filter name=postgres-test --format '{{.Names}}' | head -1)
+          echo "postgres-test container: $CONTAINER_NAME"
+          PG_IP=$(docker inspect "$CONTAINER_NAME" \
+            --format '{{json .NetworkSettings.Networks}}' \
+            | python3 -c "import sys,json; nets=json.load(sys.stdin); print(list(nets.values())[0]['IPAddress'])" 2>/dev/null)
+          # fallback: host 上 exposed port 15432
+          if [ -z "$PG_IP" ]; then
+            PG_IP="127.0.0.1"
+            PG_PORT="15432"
+          else
+            PG_PORT="5432"
+          fi
+          echo "postgres-test IP: $PG_IP:$PG_PORT"
+          TEST_DATABASE_URL="postgresql+asyncpg://awoooi:awoooi_test_2026@${PG_IP}:${PG_PORT}/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