This holds the descriptive text for this specific FSM run, similar in spirit to the endpoint-level description field but scoped to this particular run instance. When multiple sync attempts, FSM runs, have occurred for the same endpoint, this per-run description is what lets an admin distinguish what happened during this specific attempt versus an earlier failed attempt, rather than only seeing the endpoint's current overall state. This run's description might read 'Sync completed successfully' even if a prior FSM run for the same endpoint recorded a failure description.