refactor(decision_manager): I2 DI 化 MCP Providers + fix config list type bug

- DecisionManager.__init__ 注入 SSHProvider/K8sProvider，移除函數內 import+實例化
- config.get_tg_user_whitelist() 支援 list 輸入（monkeypatch/直接傳入），修復 AttributeError
- LOGBOOK 更新（test fix 6e0ee8b）

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

apps/api/src/core/config.py

@@ -400,6 +400,9 @@ class Settings(BaseSettings):
     def get_tg_user_whitelist(self) -> list[int]:
         """Parse comma-separated or JSON array user IDs to list[int]"""
         raw = self.OPENCLAW_TG_USER_WHITELIST
+        # 已是 list（測試 monkeypatch 或程式碼直接傳入）
+        if isinstance(raw, list):
+            return [int(uid) for uid in raw]
         if not raw or not raw.strip():
             return []
         # Handle JSON array format or comma-separated