Every insert into the messages store must tolerate a duplicate external id, treating a zero row insert as success without emitting events. Meta redelivers on retries and history backfill overlaps. At least one insert path still lacks a conflict clause.
Trigger: already relevant, redelivery happens today.
Every insert into the messages store must tolerate a duplicate external id, treating a zero row insert as success without emitting events. Meta redelivers on retries and history backfill overlaps. At least one insert path still lacks a conflict clause.
Trigger: already relevant, redelivery happens today.