fix: Move ensureWorkerRunning to start of hooks to prevent race condition

All hooks now call ensureWorkerRunning() BEFORE querying the database. This
ensures the worker's orphaned session cleanup runs before hooks check for
active sessions, preventing 404 errors when hooks try to use sessions that
don't exist in worker memory after a restart.

Hook order now:
1. ensureWorkerRunning() - starts worker, runs cleanup
2. Query DB - cleanup already marked orphaned sessions as failed
3. Use session - only valid sessions are processed

Fixed in:
- new-hook: Line 26, before DB queries
- save-hook: Line 37, before DB queries
- summary-hook: Line 24, before DB queries
- cleanup-hook: Line 50, before DB queries

This prevents the race condition where hooks would read session status before
cleanup ran, then get 404 from worker after cleanup marked sessions failed.

src/hooks/new.ts

@@ -21,9 +21,17 @@ export async function newHook(input?: UserPromptSubmitInput): Promise<void> {
 
   const { session_id, cwd, prompt } = input;
   const project = path.basename(cwd);
+
+  // Ensure worker is running first (runs cleanup if restarting)
+  const workerReady = await ensureWorkerRunning();
+  if (!workerReady) {
+    throw new Error('Worker service failed to start or become healthy');
+  }
+
   const db = new SessionStore();
 
   try {
+
     // Check for any existing session (active, failed, or completed)
     let existing = db.findActiveSDKSession(session_id);
     let sessionDbId: number;
@@ -54,12 +62,6 @@ export async function newHook(input?: UserPromptSubmitInput): Promise<void> {
       }
     }
 
-    // Ensure worker service is running (v4.0.0 auto-start)
-    const workerReady = await ensureWorkerRunning();
-    if (!workerReady) {
-      throw new Error('Worker service failed to start or become healthy');
-    }
-
     // Get fixed port
     const port = getWorkerPort();