Namespaces that did not fully migrate — failed or partial vectors, or a namespace-level error.
Since vectors are migrated after the DB merge commits, these are surfaced for retry/telemetry
(the merge itself has already succeeded) rather than used to block the merge.
Namespaces that did not fully migrate — failed or partial vectors, or a namespace-level error. Since vectors are migrated after the DB merge commits, these are surfaced for retry/telemetry (the merge itself has already succeeded) rather than used to block the merge.