add model path in app.py

app.py

@@ -4,7 +4,7 @@ import inference
 def translate_fortran_to_rust(fortran_code, fortran_explain):
     """Translate Fortran code to Rust using the provided model."""
     # Translation logic, with example stubbed function call
-    rust_code = inference.main(USER_INPUT_CODE = fortran_code, USER_INPUT_EXPLANATION = fortran_explain)
+    rust_code = inference.main(USER_INPUT_CODE = fortran_code, USER_INPUT_EXPLANATION = fortran_explain, MODEL_PATH = "lora_model")
     return rust_code
 
 default_codes = """