feat: Add time-restricted scheduling for worker2 (noise constraint)

- Worker2 (bd-host01) now only runs 19:00-06:00 due to noise
- Added is_worker_allowed_to_run() function for time-based control
- Worker1 continues 24/7 operation
- Reset stuck chunk 14 that was blocking progress since Dec 2

cluster/v9_advanced_coordinator.py

@@ -27,6 +27,9 @@ WORKERS = {
         'host': 'root@10.20.254.100', 
         'workspace': '/home/backtest_dual/backtest',
         'ssh_hop': 'root@10.10.254.106',
+        'time_restricted': True,  # Only run during off-hours due to noise
+        'allowed_start_hour': 19,  # 7 PM
+        'allowed_end_hour': 6,     # 6 AM
     }
 }
 
@@ -289,6 +292,12 @@ def main():
         
         # Assign work to idle workers
         for worker_name in WORKERS.keys():
+            # Check if worker is allowed to run (time restrictions)
+            if not is_worker_allowed_to_run(worker_name):
+                if iteration % 10 == 0:  # Log every 10 iterations to avoid spam
+                    print(f"⏰ {worker_name} not allowed (office hours, noise restriction)")
+                continue
+            
             # Check if worker is idle (simplified: assume one chunk per worker)
             conn = sqlite3.connect(DB_PATH)
             cursor = conn.cursor()