fix: truncate texts to 256 tokens for BERTScore to avoid index out of bounds

Disable rescale_with_baseline because BERTScore lacks pre-computed baselines for vinai/phobert-base

Upgrade PyTorch to >=2.6.0 to fix CVE-2025-32434 torch.load vulnerability

Fix BERTScore layer KeyError by specifying num_layers=9 for PhoBERT

Update BERTScore model to vinai/phobert-base with vi lang

fix: pin numpy<2 and transformers<5 to fix torch 2.2 ABI conflicts

fix: collapse python -c to single line to avoid IndentationError; move pre-bake before USER appuser

feat: add BERTScore FastAPI microservice with distilroberta-base

initial commit