Moves _BotAdminServer to modules/admin_server.py (renamed BotAdminServer)
and the create_default_config method + 360-line template string to
modules/default_config.py. core.py shrinks from 2,289 to ~1,870 lines;
all 44 core tests and 2866 total tests still pass.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
agessaman