The section's open assignments with their files, for the call's "Assignment files" tab. A breakout resolves to its parent class.

{organization_id, group_id, timezone, secondary_timezone, assignments}. The two ids are what the in-app viewer pages a PDF through (/organizations/{org}/groups/{group}/assignments/{a}/items/{i}/pages), which applies the same section gate again.

sync def on purpose: sync DB and no awaits, so it runs in the threadpool rather than on the event loop.