Attestation uniqueness is per (assignment, round)

Shipped

November 7, 2026 at 8:00 PM UTC

Author

Kamo

Commit

c0257dd

HR review lets a returned package be finished again, and each Finish writes its own attestation linked to the previous round. Ensure the (assignment_uid, round) unique index, then retire the single-column one so a KI run never re-creates it (already applied to YugabyteDB by hand).