Fix CLAP processor: audios -> audio kwarg

transformers 5.x renamed the parameter.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/haunt_fm/services/embedding.py

@@ -40,7 +40,7 @@ def embed_audio(audio: np.ndarray, sample_rate: int = 48000) -> np.ndarray:
     if _model is None or _processor is None:
         raise RuntimeError("CLAP model not loaded. Call load_model() first.")
 
-    inputs = _processor(audios=audio, sampling_rate=sample_rate, return_tensors="pt")
+    inputs = _processor(audio=audio, sampling_rate=sample_rate, return_tensors="pt")
     with torch.no_grad():
         embeddings = _model.get_audio_features(**inputs)