feat: add update_available flag to model services

Add update_available field to checkpoint, embedding, and LoRA service response formatting. The flag indicates whether a model update is available and defaults to false when not specified.

Include comprehensive tests to verify the update flag is properly included in formatted responses and defaults to false when not present in the payload.

py/services/checkpoint_service.py

@@ -38,6 +38,7 @@ class CheckpointService(BaseModelService):
             "notes": checkpoint_data.get("notes", ""),
             "model_type": checkpoint_data.get("model_type", "checkpoint"),
             "favorite": checkpoint_data.get("favorite", False),
+            "update_available": bool(checkpoint_data.get("update_available", False)),
             "civitai": self.filter_civitai_data(checkpoint_data.get("civitai", {}), minimal=True)
         }
     

py/services/embedding_service.py

@@ -38,6 +38,7 @@ class EmbeddingService(BaseModelService):
             "notes": embedding_data.get("notes", ""),
             "model_type": embedding_data.get("model_type", "embedding"),
             "favorite": embedding_data.get("favorite", False),
+            "update_available": bool(embedding_data.get("update_available", False)),
             "civitai": self.filter_civitai_data(embedding_data.get("civitai", {}), minimal=True)
         }
     

py/services/lora_service.py

@@ -38,6 +38,7 @@ class LoraService(BaseModelService):
             "usage_tips": lora_data.get("usage_tips", ""),
             "notes": lora_data.get("notes", ""),
             "favorite": lora_data.get("favorite", False),
+            "update_available": bool(lora_data.get("update_available", False)),
             "civitai": self.filter_civitai_data(lora_data.get("civitai", {}), minimal=True)
         }