0c843286a2
Add DELETE /hosts/{id}/jobs/{job_id} (per-host self-scoped, idempotent) so the
agent clears a job after executing or terminally rejecting it. The hub stores
the operator-signed blobs opaquely (no signing key — cannot forge or open);
the agent verifies + executes. Doc 03 §4/§6/§9 updated (operator-signed path
live; 8C wipe completes; 10B done).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>