fix(ci): 補 pyyaml 依賴 + 同步 Sprint 5.1 Pydantic → TypeScript 型別

- pyproject.toml: 新增 pyyaml>=6.0.0 (service_registry.py 需要)
- shared-types: 同步 PlaybookAction 三個新欄位
  (requires_approval_level / stateful_targets / requires_pre_backup)
- shared-types: 同步 ApprovalRecord 三個新欄位
  (approval_level / approval_votes / required_votes)

修正: build-and-deploy 因 import yaml 失敗 + check-type-sync 因模型未同步

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

apps/api/pyproject.toml

@@ -37,6 +37,8 @@ dependencies = [
     # 請參閱 apps/api/Dockerfile Phase 6.4i 註解
     # Phase 9: Agent Teams - Claude Agent SDK
     "claude-agent-sdk>=0.1.50",
+    # Sprint 5.1 2026-04-08 Claude Sonnet 4.6: Service Registry YAML 讀取
+    "pyyaml>=6.0.0",
 ]
 
 # [tool.uv.sources]