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

skills/skills-authoring-admin/versions/v0001/version.json

@@ -0,0 +1,22 @@
+{
+  "change_reason": "Split skill draft authoring out of default skills admin",
+  "content_hash": "placeholder",
+  "created_at": "2026-06-04T00:00:00.000000+00:00",
+  "created_by": "system",
+  "frontmatter": {
+    "description": "技能草稿创建管理。用于显式创建新 Skill draft，默认不向普通 Agent 暴露。",
+    "name": "skills-authoring-admin",
+    "tools": ["skill_manage"]
+  },
+  "parent_version": null,
+  "provenance": {
+    "source": "initial_skills",
+    "source_kind": "initial"
+  },
+  "review_state": "disabled",
+  "skill_name": "skills-authoring-admin",
+  "summary": "Skills Authoring Admin — 技能草稿创建",
+  "summary_hash": "placeholder",
+  "tool_hints": ["skill_manage"],
+  "version": "v0001"
+}