There may be an incompatibility in an implicit dependency found through Celery that is preventing the LTD Keeper workers from booting up:
Appears with LTD Keeper 1.11.0.
DM-14122 Docker image deploys ok. But the 1.9.0 image does not.
1.9.0 was built retroactively much later than the associated ticket was merged (and tickets-
DM-14122 was built).
This means I think there was a change in kombu that we're picking up as a floating implicit dependency of the pinned celery dep.