* docs: add HINDSIGHT_API_WORKER_ID tip to API quickstart
Mirrors the tip already present in installation.md so users who follow
the API quickstart's Docker tab see the same guidance about pinning a
stable worker ID. Closes#1616.
* docs: mirror WORKER_ID tip to versioned_docs v0.6 (from #1648)
Folding in xmh1011's strict-improvement hunk from #1648: the
versioned snapshot for v0.6 should carry the same production tip
as the live doc. Same prose, same `:::tip` block. Includes the
auto-regenerated skills/ reference.