Replaces the previous MIT license with GPL-3.0-or-later. Adds the full
GPL-3.0 license text at LICENSE, updates pyproject.toml metadata and
classifier, updates the README, and adds SPDX-License-Identifier headers
to all first-party server Python and client JavaScript sources.
Third-party anime.min.js is left untouched.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Support LOG_LEVEL_{MODULE} env vars (GAME, AI, HANDLERS, ROOM, AUTH,
STORES) to override the global log level for specific modules. Active
overrides are logged at startup. Includes staging/production presets
in .env.example files and a V3.18 stub doc for PostgreSQL storage
efficiency investigation.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
