Builds a unified deployment-readiness gate that aggregates verdicts from any combination of Pact `can-i-deploy`, oasdiff (OpenAPI), graphql-inspector (GraphQL), and `buf breaking` (Protobuf), applies severity-aware pass/fail thresholds, and emits a single go / no-go decision with per-finding rationale. Use when authoring a CI step that gates a deployment on cross-protocol contract compatibility.