Fix poetry.lock: Regenerate lock file to match updated pyproject.toml

- Run 'poetry lock' to regenerate lock file after authlib version update
- Ensures poetry.lock matches pyproject.toml dependencies
- All tests still passing (179 passed, 7 skipped)
- Security check confirms 0 vulnerabilities
- Ready for secure v0.9.0 release with properly synchronized dependencies

Author: howethomas