feat(federation): relay our federation identity on GET /platform/v1/federation/identity

Sergio Gimenezrequested to merge
feat/federation-identity into develop

Relays FM's new GET /internal/identity (federation-manager!28 (merged)) so the portal can fill partnerStatusLink in CreateFederation instead of asking the operator (portal!6 (merged)).

  • Role operator, like the other federation routes (ADR-0051).
  • FederationIdentity schema, marked as a platform extension (not GSMA), snake_case like FM's /internal API.
  • FM may only answer 200 or 500 here (no input); anything else is outside its contract → OEG 502 (Sec. K.6a).

Merge request reports