Update requirements.txt

Update requirements.txt

Update requirements.txt

Update requirements.txt

Update requirements.txt

Update requirements.txt

Update requirements.txt

Update requirements.txt

Add itsdangerous for session middleware support

Fix: Add missing evaluate library for HuggingFace metrics

Fix: Correct torch installation syntax and remove GPU-only packages (bitsandbytes, deepspeed)

Fix: Add pydantic-settings package (was missing underscore vs hyphen mismatch)

Add comprehensive requirements.txt