fix: Update PyTorch/torchaudio to 2.1.0 for SpeechBrain 1.0 diarization compatibility

- Update torch from 2.0.1 to 2.1.0
- Update torchaudio from 2.0.2 to 2.1.0 (fixes 'NoneType' object has no attribute 'eval' error)
- Update torchvision from 0.15.2 to 0.16.0
- Update pytorch-lightning from 2.0.6 to 2.1.0
- Add explicit speechbrain==1.0.0 dependency
- Update transformers and tokenizers for compatibility
- Update protobuf version constraint

Fixes diarization error: speechbrain.pretrained was deprecated and redirected to speechbrain.inference in SpeechBrain 1.0, but required torchaudio >= 2.1.0

Dockerfile.gpu

@@ -19,10 +19,11 @@ COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 
 # Install CUDA-optimized PyTorch (overwrites CPU versions)
+# Updated to torch 2.1.0+ for SpeechBrain 1.0 / pyannote diarization compatibility
 RUN pip install --force-reinstall \
-    torch==2.0.1+cu118 \
-    torchvision==0.15.2+cu118 \
-    torchaudio==2.0.2+cu118 \
+    torch==2.1.0+cu118 \
+    torchvision==0.16.0+cu118 \
+    torchaudio==2.1.0+cu118 \
     --index-url https://download.pytorch.org/whl/cu118
 
 # Copy application code