Upodate model tag on loras

toolkit/models/base_model.py

@@ -1486,3 +1486,7 @@ class BaseModel:
     def get_transformer_block_names(self) -> Optional[List[str]]:
         # override in child classes to get transformer block names for lora targeting
         return None
+    
+    def get_base_model_version() -> str:
+        # override in child classes to get the base model version
+        return "unknown"

toolkit/models/wan21/wan21.py

@@ -663,3 +663,6 @@ class Wan21(BaseModel):
 
     def convert_lora_weights_before_load(self, state_dict):
         return convert_to_diffusers(state_dict)
+    
+    def get_base_model_version(self):
+        return "wan_2.1"