Rehearse approval hook error after a local state change

[aruintelligence]

Adds a fourteenth project-authored host rehearsal case. The approval fixture writes an in-memory marker and throws; dispatch returns blocked/approval_error, with one approval request, no claim, and no tool callback. The guide and builder distinguish this from a guarantee that a real authorization system did not change. Regenerates the report and content-hash assets.

Focused Node tests, rehearsal --check, and asset --check pass locally. The marker is only a local fixture write, not human approval, provider activity, delivery evidence, or proof of production safety.