ci: wire verdict-backoff-chokepoint:check into the unconditional drift block

#10276 added it to the local gate after this branch's last rebase; the
branch's own checker (correctly) fails validate-code until it is wired.

Author: JSONbored

.github/workflows/ci.yml

@@ -530,6 +530,7 @@ jobs:
           npm run release-linked-versions:check
           npm run mcp:client-config:check
           npm run record-mapper-fields:check
+          npm run verdict-backoff-chokepoint:check
           npm run dispatch-provenance:check
           npm run ci-drift-checks-wired:check
       # Runs ahead of Typecheck AND "Test with coverage" (#ci-engine-build-order): src/mcp/find-opportunities.ts