feat(phase8.1-8.2): dynamic worker concurrency via worker_configs
- Migration 054: worker_configs table (queue_name PK, max/min_concurrency,
enabled, updated_at); seeds step_processing(8/2), thumbnail_rendering(1/1),
ai_validation(4/1)
- WorkerConfig SQLAlchemy model
- apply_worker_concurrency beat task: reads enabled configs, broadcasts
pool_grow to all Celery workers every 5min
- GET/PUT /api/worker/configs (admin): list + update per-queue concurrency
- docker-compose.yml: worker uses --autoscale=${MAX_CONCURRENCY:-8},${MIN_CONCURRENCY:-2};
render-worker uses --autoscale=1,1 --concurrency=1
- WorkerManagement.tsx: "Concurrency Settings" section with +/- steppers
and Save button per queue
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Hartmut
07e3d1e026