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Retention as a first-class column: how ArchiveKit stamps ExpiresAt at archive time from a TtlDays attribute, hard-deletes expired rows in bounded batches, and runs the whole thing on Lambda with the hosted services switched off. Also, the rows TTL doesn't clean yet. Part 8 of the Archive-on-Delete with ArchiveKit series.
ArchiveKit's snapshot service assembles a full JSON tree of a deleted object graph using nothing but archive rows - the primary data is already gone. Job tickets, a four-state machine, retries with a terminal Failed state, and the single-table assembly limitation I still owe a fix for. Part 7 of the Archive-on-Delete with ArchiveKit series.
Archive tables are meant to empty out - a background worker migrates their rows into the current table while live traffic reads and write-through updates race it. This part walks the EF backfill's insert-then-conditional-delete choreography and the timestamp that keeps it honest. Part 9 of the Entity Versioning with VersionKit series.
Lazy migration makes deploys instant but taxes every read of old data. VersionKit's backfill service rewrites stale payloads in scheduled batches until the store converges on the current version - in a host, or from a serverless function. Part 6 of the Entity Versioning with VersionKit series.
