fix(cd): B5 測試改用 container IP，解決 DinD port mapping 問題

act runner 內 -p 15433:5432 的 localhost 不通
改用 docker inspect 取 container IP 直連 5432

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

.gitea/workflows/cd.yaml

@@ -139,23 +139,26 @@ jobs:
           if ! command -v psql &>/dev/null; then
             apt-get install -y -q postgresql-client
           fi
-          # 啟動測試 DB（直接 docker run，避免 services: 容器名稱為空問題）
+          # 啟動測試 DB — 用 container IP 直連，避免 DinD port mapping 問題
+          # 2026-04-10 Claude Sonnet 4.6: -p 15433:5432 在 act runner 內 localhost 不通
           docker run -d --name pg-test-b5 \
             -e POSTGRES_DB=awoooi_test \
             -e POSTGRES_USER=awoooi \
             -e POSTGRES_PASSWORD=awoooi_test_2026 \
-            -p 15433:5432 \
             pgvector/pgvector:pg16
-          # 等待就緒
-          for i in $(seq 1 20); do
-            PGPASSWORD=awoooi_test_2026 pg_isready -h localhost -p 15433 -U awoooi && break || sleep 2
+          # 取得 container IP
+          PG_IP=$(docker inspect -f '{{range.NetworkSettings.Networks}}{{.IPAddress}}{{end}}' pg-test-b5)
+          echo "PG container IP: $PG_IP"
+          # 等待就緒（用 container IP，最多 60 秒）
+          for i in $(seq 1 30); do
+            PGPASSWORD=awoooi_test_2026 pg_isready -h "$PG_IP" -p 5432 -U awoooi && break || sleep 2
           done
           # 初始化 schema
           PGPASSWORD=awoooi_test_2026 psql \
-            -h localhost -p 15433 -U awoooi -d awoooi_test \
+            -h "$PG_IP" -p 5432 -U awoooi -d awoooi_test \
             -f tests/integration/setup_test_schema.sql
           # 跑測試
-          TEST_DATABASE_URL="postgresql+asyncpg://awoooi:awoooi_test_2026@localhost:15433/awoooi_test?ssl=disable" \
+          TEST_DATABASE_URL="postgresql+asyncpg://awoooi:awoooi_test_2026@${PG_IP}:5432/awoooi_test?ssl=disable" \
             /opt/api-venv/bin/pytest tests/integration/test_b5_core_flows.py -v --tb=short
           # 清理
           docker rm -f pg-test-b5 || true