feat: 添加MinIO文件系统支持并优化外部连接器功能

- 添加MinIO用户文件系统配置选项(BEAVER_MINIO_ROOT_USER等)
- 更新外部连接器配置结构，包括BASE_URL和认证令牌设置
- 改进connector provider支持更多类型(official, feishu_bot等)
- 实现Mistral模型推理模式支持reasoning_effort参数
- 增强外部连接器策略配置和运行时配置管理
- 添加connector bridge事件验证和安全保护机制
- 优化任务路由逻辑，区分simple_chat和new_task场景
- 更新初始技能工具提示配置，分离authoring admin功能

external-connector/tests/test_sidecar_api.py

@@ -70,6 +70,17 @@ def test_sidecar_http_api_requires_bearer_token(tmp_path) -> None:
     assert response.status_code == 401
 
 
+def test_sidecar_http_api_fails_closed_without_configured_token(tmp_path) -> None:
+    app = create_app(provider=FakeProvider(SidecarStateStore(tmp_path / "state.json")), api_token="")
+
+    with TestClient(app) as client:
+        response = client.get("/connectors")
+        health = client.get("/health")
+
+    assert response.status_code == 503
+    assert health.status_code == 200
+
+
 def test_sidecar_http_api_session_and_send(tmp_path) -> None:
     app = create_app(provider=FakeProvider(SidecarStateStore(tmp_path / "state.json")), api_token="sidecar-token")
     headers = {"Authorization": "Bearer sidecar-token"}