Payment Integration Readiness Pack

Assemble a go-live readiness packet for a payment integration and deterministically test the required readiness items (idempotency, retries, reconciliation, webhook handling, PCI scope, monitoring, test coverage) against the approved readiness checklist, flagging every unattested or missing item with cited evidence for an implementation manager to review. Use when a manager asks to "build the go-live readiness pack", "check we're ready to launch this integration", "what's outstanding before go-live", or "score integration readiness". HARD BOUNDARY: R3 draft/decision-support only — it NEVER approves go-live, clears an integration to launch, or declares production-readiness…