Use shared_task instead of standalone Celery apps so celery -A crm worker
discovers all tasks. Add safe defaults for all required env vars in
settings.py so missing .env no longer crashes Django. Create idempotent
management command to bootstrap a superuser in Docker. Populate
.env.example with working dev defaults.
Fixes#490, #493, #508, #388, #383, #382, #381, #441, #519
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Dockerize the full stack so developers can run everything with
`docker compose up`. Replaces the outdated Dockerfile and
docker-compose.yml with a working 6-service setup: PostgreSQL,
Redis, Django backend, Celery worker, Celery beat, and SvelteKit
frontend.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
