fix(cron): persist manual run ids in history (#76288)

Summary:
- The PR carries manual `cron.run` acknowledgement IDs into finished cron events and `cron.runs` history, upda ...  surfaces, adds regression coverage, refreshes the SDK baseline hash, and records the fix in the changelog.
- Reproducibility: yes. Current main can be reproduced by source inspection: `cron.run` returns a `manual:...` ... r path omits it; the PR adds targeted assertions for the missing correlation and the task-ledger invariant.

ClawSweeper fixups:
- Included follow-up commit: chore(protocol): update generated cron models
- Included follow-up commit: chore(cron): document manual run id protocol surface
- Included follow-up commit: Preserve cron task ledger run IDs

Validation:
- ClawSweeper review passed for head 04ce879858.
- Required merge gates passed before the squash merge.

Prepared head SHA: 04ce879858
Review: https://github.com/openclaw/openclaw/pull/76288#issuecomment-4364868383

Co-authored-by: Paul Frederiksen <paul@paulfrederiksen.com>

docs/.generated/plugin-sdk-api-baseline.sha256

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