feat: integrate Quark and UC drive APIs

Add optional drive API capabilities for Quark and UC adapters, including directory lookup/creation, rename, move, delete, task polling, Quark recycle cleanup, and UC share staging folder support.\n\nAdd unittest coverage for capability declarations, production transfer path save_dir resolution, staging-folder flow, delete_files behavior, task polling params, and HTTP/JSON error handling.\n\nDocument the Hong Kong test server deployment boundary and verification commands.

docs/deployment/test-server.md

@@ -0,0 +1,19 @@
+# CloudSearch 测试服部署记录
+
+- 服务器：泽御云香港测试服，SSH 入口 root@82.158.228.152:18924。
+- 当前运行来源：`/root/cloudsearch_deploy`。
+- 主应用目录：`/root/cloudsearch_deploy/source_clean`。
+- 网盘能力层：`/root/cloudsearch_deploy/cloudsearch_transfer`。
+- 启动方式：Docker Compose，主容器挂载 `/root/cloudsearch_deploy` 相关目录。
+- 集成边界：只集成 cloud-auto-save 中可复用的网盘 API 调用能力；不集成签到、收益事件、收益上报，也不长期部署独立 cloud-auto-save 服务。
+- Video Parser 当前未部署，属于测试环境预期缺口，不作为主服务故障处理。
+- 本轮隔离点：`backup-before-drive-api-20260522-152138`；开发分支：`feature/cloudsearch-drive-api-20260522-152138`。
+
+## 验证命令
+
+```bash
+python3 -m unittest discover -s cloudsearch_transfer/tests -p 'test_*.py' -v
+python3 /tmp/verify_compile.py
+docker compose ps
+curl -fsS http://127.0.0.1:3000/health
+```