Parse the APT package action protocol and classify records by operation.
Use the package list to determine important and trivial snapshot chains,
then generate collision-resistant names containing shortened package data.
Select ZFS datasets through the configured property or explicit roots.
Create recursive snapshots atomically, support dry-run output, and prune
old snapshots from the matching retention chain after success.
Preserve the original warning-oriented behavior by reporting snapshot and
retention failures without aborting the package operation.
