The Docker env project had no committed .env template — new contributors
had to reverse-engineer the required variables from the compose files.
Added .env.default with all required variables, secrets replaced with XXXX,
and comments explaining each section. Notable: AE_API_GUNICORN_TIMEOUT is
documented as 900 (needed for long ffmpeg video jobs like clip_video).
Updated .gitignore to whitelist .env.default via !.env.default.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
