Fixed lazy loading caption_generator

main.py

@@ -11,7 +11,11 @@ def startup_event():
     global caption_generator
     if caption_generator is None:
         print("Loading CaptionGenerator...")
-        caption_generator = CaptionGenerator()
+        caption_generator = CaptionGenerator(
+            model_type="CLIPEncoder",
+            checkpoint_path="./vit_captioning/artifacts/CLIPEncoder_40epochs_unfreeze12.pth",
+            quantized=False
+        )
 
 @app.get("/", response_class=HTMLResponse)
 def root():