- Delete env.py module (functionality moved or no longer needed)
- Update docs/plan.md to reflect Milestone 2 completion
- Clean up constants.py by removing unused environment-related constants
- Add auction.py with add_bid and find_winner functions
- Add env.py with stdlib-based .env loader (no python-dotenv)
- Add tests/test_auction.py with test cases for auction functions
- Remove .env.example (tokens not meant to be committed)
- Update docs/plan.md to mark Milestone 2 as complete