fix memory leak: ensure hooks are cleaned up on exception in find_alignment

whisper/timing.py

@@ -193,13 +193,14 @@ def find_alignment(
 
     from .model import disable_sdpa
     
+    try:
         with torch.no_grad(), disable_sdpa():
             logits = model(mel.unsqueeze(0), tokens.unsqueeze(0))[0]
             sampled_logits = logits[len(tokenizer.sot_sequence) :, : tokenizer.eot]
             token_probs = sampled_logits.softmax(dim=-1)
             text_token_probs = token_probs[np.arange(len(text_tokens)), text_tokens]
             text_token_probs = text_token_probs.tolist()
-
+    finally:
         for hook in hooks:
             hook.remove()