fix: apply session reset fix to SessionStore.createSDKSession (correct location)

Previous fix was applied to sessions/create.ts which is unused.
The actual method called by the worker is SessionStore.createSDKSession
in src/services/sqlite/SessionStore.ts.

Now resets started_at_epoch when session is completed or older than
the 4-hour wall-clock limit, preventing age limit blocks after mac
sleep/resume without proper SessionEnd.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/services/sqlite/SessionStore.ts

@@ -1626,10 +1626,31 @@ export class SessionStore {
 
     // Session reuse: Return existing session ID if already created for this contentSessionId.
     const existing = this.db.prepare(`
-      SELECT id, platform_source FROM sdk_sessions WHERE content_session_id = ?
-    `).get(contentSessionId) as { id: number; platform_source: string | null } | undefined;
+      SELECT id, platform_source, completed_at_epoch, started_at_epoch FROM sdk_sessions WHERE content_session_id = ?
+    `).get(contentSessionId) as { id: number; platform_source: string | null; completed_at_epoch: number | null; started_at_epoch: number } | undefined;
+
+    // 4-hour wall-clock limit (must match SDKAgent.MAX_SESSION_WALL_CLOCK_MS)
+    const MAX_SESSION_MS = 4 * 60 * 60 * 1000;
 
     if (existing) {
+      // Reset session if completed OR older than the wall-clock age limit.
+      // Handles mac sleep/resume where worker restarts but SessionEnd never fired,
+      // leaving a stale started_at_epoch that blocks all observations and summaries.
+      const ageMs = nowEpoch - existing.started_at_epoch;
+      const needsReset = !!existing.completed_at_epoch || ageMs > MAX_SESSION_MS;
+      if (needsReset) {
+        logger.info('SESSION', 'Resetting stale session on resume (mac sleep/worker-restart detected)', {
+          contentSessionId,
+          ageHours: Math.round(ageMs / 36e5 * 10) / 10,
+          wasCompleted: !!existing.completed_at_epoch
+        });
+        this.db.prepare(`
+          UPDATE sdk_sessions
+          SET started_at_epoch = ?, started_at = ?, completed_at_epoch = NULL, completed_at = NULL, status = 'active'
+          WHERE content_session_id = ?
+        `).run(nowEpoch, now.toISOString(), contentSessionId);
+      }
+
       // Backfill project if session was created by another hook with empty project
       if (project) {
         this.db.prepare(`