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

app-instance/backend/beaver/tasks/router.py

@@ -161,6 +161,9 @@ class MainAgentRouter:
             "Critical policy:\n"
             "- If there is an active Task, choose continue_task or revise_task unless the user's topic is completely unrelated "
             "to that Task or the user explicitly closes/abandons it.\n"
+            "- With an active Task, choose simple_chat for unrelated lightweight conversation and new_task for unrelated work "
+            "that needs Task capabilities. Either decision starts a new topic.\n"
+            "- An unrelated lightweight conversation must not be classified as revise_task merely because the active Task is awaiting acceptance.\n"
             "- Choose revise_task when the active Task is awaiting feedback or needs revision and the user asks for changes "
             "such as '改一下', '加上', '删除', '换成', '再详细点', '格式改成', '不要', or equivalent wording.\n"
             "- Choose continue_task for neutral follow-up questions or additional next steps that do not imply dissatisfaction with the previous result.\n"