Two follow-ups from the post-cutover diagnosis:
1. version_gate: forgejo → local git fallback. If forgejo refresh
returns empty AND a local repo path is configured, retry against
`git log` from the local checkout. The receiver service runs on
the same Pi as forgejo, so a simultaneous restart used to leave
the gate's cache empty and reject every PUT with not-in-window.
Auto-detects /opt/cis490/.git when the operator hasn't set
local_repo_path explicitly — that path is always present on a
production receiver and ProtectSystem=strict still allows reads.
Logs `source=git-fallback` so this isn't silent.
2. shipper/queue: sweep orphaned outbox tarballs. The lifecycle
invariant is `outbox/<id>.tar.zst exists ⇒ episodes/<id>/ exists`
— broken historically by the now-fixed fatal-loop, by operator
`rm` of an episode dir, or by an OS crash between rename(2) and
the post-ship cleanup. Without sweeping, dead bytes pile up
forever. New _sweep_outbox runs at the start of every scan,
bounded by the file count in outbox/.
Tests cover: fallback fires when forgejo unreachable + repo_path set;
no fallback when repo_path None (opt-in); orphan tarball + partial
get swept on the next pass; live tarballs untouched.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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