Verify PR #15705 / BOLT-2121 final state

PR #15705 is OPEN (earlier 404 was a stale GitHub-auth artifact, not a merge/close). CI has been red since 09-22 due to TS2561: change used timeoutMs instead of timeout on IClientCredentialsGraphQLRequest. timeout is the correct prop (ms, via AbortSignal.timeout). Fixed both call sites (adapters/program + domains/program), pushed commit d10a634. Monitoring CI. Next: confirm green, then request Slava review (do NOT merge).