Already gitignored at packages/solidity/aitbc-token/artifacts/ but
files were still tracked from before. Removes 2.2MB of Hardhat
build-info and compiled contract JSON from git history going forward.
chore: refactor logging module, update genesis timestamp, remove model relationships, and reorganize routers
- Rename logging.py to logger.py and update import paths in poa.py and main.py
- Update devnet genesis timestamp to 1766828620
- Remove SQLModel Relationship declarations from Block, Transaction, and Receipt models
- Add SessionDep type alias and get_session dependency in coordinator-api deps
- Reorganize coordinator-api routers: replace explorer/registry with exchange, users, marketplace