When `docker run -d` fails after Docker has already created the container
object (e.g. exit 125 when the daemon isn't ready, or a timeout mid image
pull), the code raised before `self._container_id` was set — so the
container leaked permanently in "Created" state. Reported in #7439:
110+ orphaned containers accumulated over 3 days from hourly cron-
scheduled gateway sessions hitting a Docker Desktop startup race.
The orphan reaper added in #33645 (reap_orphan_containers) does NOT cover
this case: it filters `status=exited`, but a failed-create container is in
`Created` state, so it slips through and is never reaped.
Wrap the `docker run -d` call in try/except and `docker rm -f` the
container by its known name before re-raising.
Salvages #7440 by @Tranquil-Flow. Their branch predated the cross-process
reuse + labels rework on `main`, so a cherry-pick conflicted; reconstructed
the same intent (plus their two regression tests, adapted to mock the new
reuse `docker ps` probe) against current `main`.
Verified adversarially: reverted just the product change to origin/main's
`docker.py`, ran the two new tests -> both FAIL with
`assert 0 == 1 ("docker rm should be called once")`. With the fix applied,
both pass; full test_docker_environment.py is 65/65 green.
Closes#7440. Fixes#7439.
Co-authored-by: Evi Nova <66773372+Tranquil-Flow@users.noreply.github.com>
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