Argon2 password hashing, JWT session issuing/verification (auth/security.py), register/login routes, the bearer-token get_current_user dependency, and GET /users/me for address + balance. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Package skeleton, pyproject/alembic config, env-driven settings (app/config.py), and the SQLAlchemy models + initial Alembic migration covering users, UTXO events, rounds/participants, round config, pending transactions, withdrawals and the audit log. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>