server-ws.mjs imports ./peer-stamp.mjs but the npm-pack path didn't include it:
prepublish.ts didn't copy it and pack-artifact-policy pruned it (not in the
app/ allowlist). Without it the WS wrapper throws ERR_MODULE_NOT_FOUND on boot
and the peer-IP stamp (authz LOCAL_ONLY locality) never runs. Copy it in
prepublish + allowlist + mark required so a regression fails the pack.