data-ingestors contract version has moved past the CLI's pin

[github-actions]

The pinned data-ingestors layout contract is a VERSION behind HEAD.

Scheduled run: https://github.com/tracebloc/cli/actions/runs/33366237529

data-ingestors dataset-layout contract version
  pin            8f89aece1e0c249a28644eb6cdec47b7572bbec6  ->  v2
  default branch develop  ->  v3
DRIFT: the pinned contract is v2, but data-ingestors HEAD is v3.
The CLI's vendored layout/sidecar/help are derived from a stale contract version.
Fix: bump scripts/.data-ingestors-ref, run scripts/sync-schema.sh, commit the regenerated files (cli#286 shape).

Fix (cli#286 shape): bump scripts/.data-ingestors-ref, run scripts/sync-schema.sh, and commit the regenerated internal/schema/* in one deliberate PR. Close this issue when that lands.