feat: add GPU decorator to transcribe_audio_phi function

model.py

@@ -146,6 +146,7 @@ def load_phi_model() -> None:
         raise
 
 
+@spaces.GPU(duration=get_gpu_duration)
 def transcribe_audio_phi(audio: str) -> str:
     """
     Transcribe audio using the Phi-4 model.