Upgrade to ROCm 7.2, Python 3.11, PyTorch 2.11.0

- Base image: rocm/dev-ubuntu-22.04:6.1 → 7.2
- Python 3.10 → 3.11 via deadsnakes PPA
- torch/torchaudio: 2.5.1 → 2.11.0
- torchvision: 0.20.1 → 0.26.0
- pytorch_triton_rocm: 3.1.0 → 3.3.0
- transformers: 4.46.3 → >=4.50.0
- diffusers: 0.29.0 → >=0.32.0
- safetensors: >=0.4.1 → >=0.4.5
- config: temperature 0.8→0.9, seed 0→1960

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

requirements-rocm.txt

@@ -5,9 +5,9 @@ librosa==0.11.0
 pyloudnorm
 
 # ML dependencies (pinned to match chatterbox without overwriting ROCm torch)
-transformers==4.46.3
-diffusers==0.29.0
-safetensors>=0.4.1
+transformers>=4.50.0
+diffusers>=0.32.0
+safetensors>=0.4.5
 huggingface-hub
 omegaconf