specs for glamsterdam

[macfarla]

PR Description

• schemas.yaml: Added PayloadAttestationMessageSigning (the signing request schema) and PayloadAttestationData (the inner data object with its 4 fields)
• sign.yaml: Added PayloadAttestationMessageSigning to the oneOf list and PAYLOAD_ATTESTATION_MESSAGE to the discriminator mapping

Fixed Issue(s)

Documentation

• I thought about documentation and added the doc-change-required label to this PR if updates are required.

Changelog

• I thought about adding a changelog entry, and added one if I deemed necessary.

Testing

• I thought about testing these changes in a realistic/non-local environment.

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Note

Low Risk
Additive OpenAPI schema changes only; main risk is downstream client/server codegen needing to handle the new discriminator type.

Overview
Adds a new signing request type, PAYLOAD_ATTESTATION_MESSAGE, to the signing API spec.

Updates paths/sign.yaml to accept the new request in the oneOf payload and discriminator mapping, and extends schemas.yaml with PayloadAttestationMessageSigning plus its inner PayloadAttestationData object (block root, slot, and two availability booleans).

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[usmansaleem]

#1192