v0.12.9

Changes

• Changed: the worker's heartbeat, which runs every minute, no longer
  fills the recent runs of the Tasks page. django_stack.studio.HueyAdapter
  leaves it out. The dashboard no longer shows the queued and failed task
  counts. In an existing project, import HueyAdapter from
  django_stack.studio in backend/config/studio.py and remove the two
  TaskStatisticWidget lines.

Fixes

• Fixed: dstack dev could start the production build of the frontend
  and crash. The dev services had no image key, so Compose named their
  images <project>-backend and <project>-frontend, the same names as
  the prod images; building prod replaced the dev images. The dev
  services in compose.yaml now have their own image names. In an
  existing project, add an image line to the backend, worker and
  frontend services, then run docker compose --profile dev build:

    backend:
      image: <project>-backend-dev
    worker:
      image: <project>-backend-dev
    frontend:
      image: <project>-frontend-dev