fix: update default rate limit for generations in app.py

app.py

@@ -28,7 +28,7 @@ MODAL_ENDPOINT = os.getenv('FAL_MODAL_ENDPOINT')
 MODAL_AUTH_TOKEN = os.getenv('MODAL_AUTH_TOKEN')
 
 # Rate limiting configuration
-RATE_LIMIT_GENERATIONS = int(os.getenv('RATE_LIMIT_GENERATIONS', '5'))  # Default 5 generations per hour
+RATE_LIMIT_GENERATIONS = int(os.getenv('RATE_LIMIT_GENERATIONS', '1'))  # Default 5 generations per hour
 RATE_LIMIT_WINDOW = int(os.getenv('RATE_LIMIT_WINDOW', '3600'))  # Default 1 hour in seconds
 
 # In-memory rate limiting storage (for production, consider Redis)