projectOrName falls back to a label-driven, file-less project on any
load failure when COMPOSE_PROJECT_NAME is set -- swallowing the load
error entirely, including "no such service" for a target that's
actually a declared job. Since that branch returns err == nil,
jobTargetErr (gated on err != nil) and rejectScheduledJobs (gated on
project != nil) were both skipped: `docker compose start migrate`
fell through to a label-driven start that finds no container for a
job that was never run, and exited 0 having silently done nothing.
Refuse a named job explicitly on that fallback path too, reusing
unselectedJobs from the previous commit.
Also adds the test coverage this and the previous fix (job-target
error messages on create/start) were entirely missing: create.go and
start.go had no unit tests at all, and pkg/e2e/jobs_test.go only
exercised up/run.
Signed-off-by: Nicolas De Loof <[email protected]>
