Every document-processing system I have worked on arrives at the same shape. Something uploads a file, something else has to read it, run it through an extraction or inference step that takes seconds to minutes, and store a result. The work is slow, it fails sometimes, and the answer has to be auditable afterwards.
This is a companion discussion topic for the original entry at https://percona.community/blog/2026/09/16/postgresql-workflow-engine-long-running-jobs/