Fast_copy new release with new features

v3.1.2 — 2026-05-24

Adds -R, --keep-parents to multi-source and glob copies. Without the
flag (unchanged default), each source is written under its basename:
fast-copy /etc /var/log dst/ produces dst/etc/ and dst/log/. With
the flag, each source's full parent path is preserved (rsync -R
semantics): the same command produces dst/etc/ and dst/var/log/.

Why this matters

The basename layout is great for Longhorn-style backups where every
source has a unique name (pvc-*). It's wrong for incident snapshots,
forensic captures, and any case where mixing sources from different
parent directories needs unambiguous provenance — dst/log/ does not
tell a future analyst whether the original was /var/log or
/usr/local/log, and two sources with the same basename would silently
merge. --keep-parents preserves the full path so the snapshot tree
mirrors the source filesystem exactly.

Scope

• Affects multi-source mode (≥2 source paths) and glob mode (single
  quoted pattern fast-copy expands internally).
• Single-source copies (fast-copy /var/log dst/) emit a one-line note
  and are unchanged — the flag has no observable effect there.
• No change to any other code path: dedup, sparse-file detection,
  --use-sudo hardening, SSH transfers, and the v3.1.1 security
  posture are all identical.

Usage

# Incident snapshot — preserve full /etc, /var/log, /home/operator
fast-copy --use-sudo -R /etc /var/log /home/operator /mnt/snap/
# Produces /mnt/snap/etc/, /mnt/snap/var/log/, /mnt/snap/home/operator/

# Longhorn replicas (no flag needed — unique basenames already)
fast-copy /var/lib/longhorn/replicas/pvc-* /mnt/backup/