Module snapshot 

Functions

backup_path_with_tag

Generate a unique backup path for a target file (includes a timestamp). Public so callers (preflight/tests) can compute expected names.

create_snapshot

Create a snapshot (backup payload and sidecar) of the current target state.

has_backup_artifacts

Public helper for preflight/tests: check if there are backup artifacts (payload and/or sidecar) for the given target and tag.