Real local publish success pipeline replacing the ci-publish stub: validate manifest,
find/create app + draft release, per-artifact content-address store (P2.2) + common
validation (P3.3) with optional manifest-declared size/sha256 (PO ruling), publish via
the repo integrity transaction with channel promotion + audit events (P2.3), persist
db.json (P2.3), emit stable JSON (release id, artifact ids, sha256, file:// URLs) with
--json purity. make publish-example target + tests/publish_happy.sx (fail-before/pass-after).
Salvaged from a worker that completed the work (make test 10/10) but hit the 50-min wall
before committing; manager-verified at ground truth (make test green, make publish-example
exit 0, stored object re-hashes to its key via shasum, db.json records release/2 artifacts/
channel/4 audit events).
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