Fix subscription timestamps to use configured timezone

main.py

@@ -36,6 +36,7 @@ from app.services.system_settings_service import bot_configuration_service
 from app.services.external_admin_service import ensure_external_admin_token
 from app.services.broadcast_service import broadcast_service
 from app.utils.startup_timeline import StartupTimeline
+from app.utils.timezone import TimezoneAwareFormatter
 
 
 class GracefulExit:
@@ -49,13 +50,20 @@ class GracefulExit:
 
 
 async def main():
+    formatter = TimezoneAwareFormatter(
+        '%(asctime)s - %(name)s - %(levelname)s - %(message)s',
+        timezone_name=settings.TIMEZONE,
+    )
+
+    file_handler = logging.FileHandler(settings.LOG_FILE, encoding='utf-8')
+    file_handler.setFormatter(formatter)
+
+    stream_handler = logging.StreamHandler(sys.stdout)
+    stream_handler.setFormatter(formatter)
+
     logging.basicConfig(
         level=getattr(logging, settings.LOG_LEVEL),
-        format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
-        handlers=[
-            logging.FileHandler(settings.LOG_FILE, encoding='utf-8'),
-            logging.StreamHandler(sys.stdout)
-        ]
+        handlers=[file_handler, stream_handler],
     )
     
     logger = logging.getLogger(__name__)