refactor(architecture): 修复模块依赖违规并强化架构守护

- 字幕编排上移 DownloadChain.download_site_subtitles，SubtitleModule 仅保留站点链接解析
- TransferChain.recommend_name 上移 TV episodes_info 获取，filemanager 模块不再导入 TmdbChain
- endpoint 穿透修复：WXBizMsgCrypt3 迁至 adapters/external/wechat_crypt.py；
  music/tmdb 缓存管理、listenbrainz 常量、TMDbException、WechatClawBot 辅助统一经 chain 包装
- RuleParser 与 builtin_rules 合并为 application/filter_rules.py；
  fsproxy/fsworker 迁至 adapters/system/
- chain/__init__.py 删除 qbittorrentapi/transmission_rpc 导入，消除后端协议类型泄漏
- 架构守护测试新增三项检查：模块间隔离、入口层穿透、下载器 SDK 泄漏
- 文档同步：05-architecture.md 记录 DB/Oper 聚合例外与迁移文件位置，AGENTS.md 更新所有权表

tests/test_music_recognize_cache.py

@@ -314,7 +314,9 @@ def test_music_cache_endpoint_returns_management_statistics(monkeypatch):
         "recognized": {"media_id": "rec-1", "title": "晴天"},
         "unrecognized": {"media_id": "", "title": "未知曲目"},
     })
-    monkeypatch.setattr(music_endpoint, "MusicBrainzCache", lambda: cache)
+    monkeypatch.setattr(
+        music_endpoint.MusicBrainzChain, "cache_items", staticmethod(cache.list_items)
+    )
 
     response = asyncio.run(music_endpoint.music_recognition_cache(None))
 
@@ -328,7 +330,9 @@ def test_music_cache_endpoint_returns_management_statistics(monkeypatch):
 def test_music_cache_delete_endpoint_reports_missing_item(monkeypatch):
     """删除接口应区分成功删除与缓存不存在。"""
     cache = _build_music_cache({"existing": {"media_id": "rec-1"}})
-    monkeypatch.setattr(music_endpoint, "MusicBrainzCache", lambda: cache)
+    monkeypatch.setattr(
+        music_endpoint.MusicBrainzChain, "delete_cache", staticmethod(cache.delete)
+    )
 
     deleted_response = asyncio.run(
         music_endpoint.delete_music_recognition_cache("existing", None)
@@ -344,7 +348,9 @@ def test_music_cache_delete_endpoint_reports_missing_item(monkeypatch):
 def test_music_cache_clear_endpoint_removes_all_items(monkeypatch):
     """清空接口应删除全部音乐识别缓存。"""
     cache = _build_music_cache({"existing": {"media_id": "rec-1"}})
-    monkeypatch.setattr(music_endpoint, "MusicBrainzCache", lambda: cache)
+    monkeypatch.setattr(
+        music_endpoint.MusicBrainzChain, "clear_cache", staticmethod(cache.clear)
+    )
 
     response = asyncio.run(music_endpoint.clear_music_recognition_cache(None))