fix: Update transformers for Devstral support

Devstral-Small requires transformers>=4.44 for proper Mistral
architecture support. Old version (4.36.2) caused shape mismatch
errors during model loading.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

requirements.txt

@@ -7,8 +7,8 @@ pydantic==2.5.0
 
 # Machine Learning
 torch==2.1.0
-transformers==4.36.2
-accelerate==0.24.1
+transformers>=4.44.0
+accelerate>=0.30.0
 
 # Utilities
 numpy==1.24.3