Module package_versions 

Sequential pipeline that populates the schema::package_versions CF: one row per (original_package_id, version) published in the checkpoint.

Each row records the storage id and the checkpoint at which the version was published. As a history-cohort member this CF is both restored and backfilled: the live-set restore writes its rows via store_restored, leaving the publish checkpoint unset (a restore floor), and the embedded backfill of (L, T] then re-publishes every version created in that window with its real publish checkpoint, overwriting the floor. Versions that predate the available window are never re-published, so they keep their floor and read as having always existed.

Pure puts — packages are immutable once written, so a later publish at the same (original_id, version) (which would itself be a chain-level error) deterministically overwrites the prior storage id rather than dueling with it. The same overwrite is what lets the backfill replace a restore floor with the real publish checkpoint.

Structs

PackageVersions

Pipeline marker for package_versions.

Row