Guardrail event wrapper added.
RogueGrid Backend Sandbox Event Envelope
Backend Sandbox Guardrail Event Envelope V1
Wraps sandbox dry-run outputs in a consistent event envelope with trace identity, blocked capabilities, owner review summary, rollback preview, audit candidate preview, external action block report, and explicit non-persistence posture.
Only blocked dry-run output.
No database or audit writes.
No production action can execute.