feat: Implement Worker Service for long-running HTTP service with PM2 management

- Introduced WorkerService class to handle HTTP requests and manage sessions.
- Added endpoints for health check, session management, and data retrieval.
- Integrated ChromaSync for background data synchronization.
- Implemented SSE for real-time updates to connected clients.
- Added error handling and logging throughout the service.
- Cached Claude executable path for improved performance.
- Included settings management for user configuration.
- Established database interactions for session and observation management.

plugin/scripts/save-hook.js

@@ -341,11 +341,7 @@ ${e.stack}`:e.message;if(Array.isArray(e))return`[${e.length} items]`;let s=Obje
       UPDATE sdk_sessions
       SET status = 'failed', completed_at = ?, completed_at_epoch = ?
       WHERE id = ?
-    `).run(s.toISOString(),t,e)}cleanupOrphanedSessions(){let e=new Date,s=e.getTime();return this.db.prepare(`
-      UPDATE sdk_sessions
-      SET status = 'failed', completed_at = ?, completed_at_epoch = ?
-      WHERE status = 'active'
-    `).run(e.toISOString(),s).changes}getSessionSummariesByIds(e,s={}){if(e.length===0)return[];let{orderBy:t="date_desc",limit:r}=s,n=t==="date_asc"?"ASC":"DESC",o=r?`LIMIT ${r}`:"",i=e.map(()=>"?").join(",");return this.db.prepare(`
+    `).run(s.toISOString(),t,e)}getSessionSummariesByIds(e,s={}){if(e.length===0)return[];let{orderBy:t="date_desc",limit:r}=s,n=t==="date_asc"?"ASC":"DESC",o=r?`LIMIT ${r}`:"",i=e.map(()=>"?").join(",");return this.db.prepare(`
       SELECT * FROM session_summaries
       WHERE id IN (${i})
       ORDER BY created_at_epoch ${n}