feat: add update service dependency and has_update filter

- Pass ModelUpdateService to CheckpointService, EmbeddingService, and LoraService constructors
- Add has_update query parameter filter to model listing handler
- Update BaseModelService to accept optional update_service parameter

These changes enable model update functionality across different model types and provide filtering capability for models with available updates.

py/routes/checkpoint_routes.py

@@ -20,8 +20,8 @@ class CheckpointRoutes(BaseModelRoutes):
     async def initialize_services(self):
         """Initialize services from ServiceRegistry"""
         checkpoint_scanner = await ServiceRegistry.get_checkpoint_scanner()
-        self.service = CheckpointService(checkpoint_scanner)
         update_service = await ServiceRegistry.get_model_update_service()
+        self.service = CheckpointService(checkpoint_scanner, update_service=update_service)
         self.set_model_update_service(update_service)
 
         # Attach service dependencies
@@ -95,4 +95,4 @@ class CheckpointRoutes(BaseModelRoutes):
             return web.json_response({
                 "success": False,
                 "error": str(e)
-            }, status=500)
+            }, status=500)