fix: send 'code' instead of 'user_code' to OllaBridge /pair endpoint

fix: mount OllaBridge proxy router in api.py (models/health/pair endpoints)

fix: handle list-type Pydantic validation errors in PairResponse

fix: correct OllaBridge URL from ollabridge-cloud to ollabridge everywhere

fix: remove litellm/watsonx/langchain-ibm from core deps, use pip install -e . only

fix: remove litellm version pin and fix pip fallback logic in Dockerfile

Deploy GitPilot to HF Space - full stack with React frontend + FastAPI backend