fix(docs): update stale mcp_server references for gitea-mcp migration

- DEBUGGING-CHECKLIST: gitea test uses gitea_mcp.server (not mcp_server)
- debug-mcp skills: generic module placeholder, gitea exception noted
- Removed orphan .doc-guardian-queue from projman

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

plugins/debug-mcp/agents/mcp-debugger.md

@@ -43,6 +43,9 @@ The `.mcp.json` file in the project root defines all MCP servers:
     }
   }
 }
+
+**Note:** Most servers use `mcp_server.server` (local source).
+Exception: gitea uses `gitea_mcp.server` (pip-installed package).
 ```
 
 ### MCP Server Lifecycle