CipherMiniResponseModel : The shape shared by every cipher response. Abstract because a response
has to say which data it carries: a Partial* subclass emits the reduced
Bit.Api.Vault.Models.Response.CipherMiniResponseModel.PartialData envelope for a leasing-gated
cipher, and a Full* subclass emits the secret
Bit.Api.Vault.Models.Response.CipherMiniResponseModel.Data blob and can only be constructed with
a Bit.Core.Vault.Authorization.FullCipherAccess witness. Both properties are declared here so
either shape serializes to the same contract.