refactor: use central flag for ControlNet image count

modules/flags.py

@@ -58,6 +58,8 @@ metadata_scheme = [
 lora_count = 5
 lora_count_with_lcm = lora_count + 1
 
+controlnet_image_count = 4
+
 class Steps(Enum):
     QUALITY = 60
     SPEED = 30