Merge main and its generated provider-output sync after #783. Release build reproduces the tracked artifacts with no diff. Engine source and the pending-publication lockfile are unchanged.
AI assistance: Codex, under maintainer direction.
Refresh engine and consumer pins plus generated distributions. The npm lockfile will be finalized after all engine platform packages are published; do not merge before the release-order guard passes.
AI assistance: Codex, under maintainer direction.