Codex Lifeboat 3.4.7 — compressed duplicate resolution

Codex Lifeboat 3.4.7 fixes a duplicate-rollout edge case reported during
follow-up testing of issue #8.

Fixed

Recognizes a physical rollout.jsonl.zst as the post-compression equivalent
of an SQLite threads.rollout_path that still names rollout.jsonl.
Selects the compressed rollout only when it is the unique database-backed
candidate in the expected active or archived collection and has a valid
SHA-256 hash.
Preserves every non-canonical candidate under codex/unreferenced-rollouts
without modifying or deleting source rollouts.
Keeps genuinely ambiguous duplicates fail-closed.

Added an end-to-end regression with three distinct .jsonl.zst rollouts that
share one thread ID while SQLite references the original .jsonl filename.
Verified canonical selection, preservation of both alternatives, byte-exact
copied payloads, source immutability, and independent package validation.
All 87 source checks and all 12 automated Windows compatibility scenarios pass.

Download Codex-Lifeboat-Windows-x64-Portable.zip, extract it completely, and
run Codex-Lifeboat.exe.

The executable remains unsigned. Keep issue #8 open until the reporter confirms
backup verification and restoration with the affected profile.