Execution-APIs Release v1.0.0-Beta.8 Debated Monday

Execution-apis PRs: EIP-8141 receipt fields, EIP-1898 block objects, testing_commitBlockV1 spec, error-code fixtures. Release v1.0.0-beta.8 debated—last cut June 10. Error codes PRs 823/784 may block. Call Monday, Aug 10, 15:00 UTC.