Add unit tests for Router configuration and transport layers

- Implemented tests for RouterConfig, RoutingOptions, StaticInstanceConfig, and RouterConfigOptions to ensure default values are set correctly.
- Added tests for RouterConfigProvider to validate configurations and ensure defaults are returned when no file is specified.
- Created tests for ConfigValidationResult to check success and error scenarios.
- Developed tests for ServiceCollectionExtensions to verify service registration for RouterConfig.
- Introduced UdpTransportTests to validate serialization, connection, request-response, and error handling in UDP transport.
- Added scripts for signing authority gaps and hashing DevPortal SDK snippets.

src/Cli/StellaOps.Cli/Services/Models/AttestorTransportModels.cs

@@ -0,0 +1,207 @@
+using System;
+using System.Collections.Generic;
+using System.Text.Json.Serialization;
+
+namespace StellaOps.Cli.Services.Models;
+
+// CLI-ATTEST-73-001: Attestor SDK transport contract models
+// Based on docs/schemas/attestor-transport.schema.json
+
+/// <summary>
+/// Request to create an attestation.
+/// </summary>
+internal sealed class AttestationRequest
+{
+    [JsonPropertyName("requestType")]
+    public string RequestType { get; init; } = "CREATE_ATTESTATION";
+
+    [JsonPropertyName("requestId")]
+    public string RequestId { get; init; } = Guid.NewGuid().ToString();
+
+    [JsonPropertyName("correlationId")]
+    public string? CorrelationId { get; init; }
+
+    [JsonPropertyName("predicateType")]
+    public string PredicateType { get; init; } = string.Empty;
+
+    [JsonPropertyName("subject")]
+    public IReadOnlyList<AttestationSubjectDto> Subject { get; init; } = Array.Empty<AttestationSubjectDto>();
+
+    [JsonPropertyName("predicate")]
+    public object Predicate { get; init; } = new { };
+
+    [JsonPropertyName("signingOptions")]
+    public SigningOptionsDto? SigningOptions { get; init; }
+}
+
+/// <summary>
+/// Response for attestation creation.
+/// </summary>
+internal sealed class AttestationResponseDto
+{
+    [JsonPropertyName("responseType")]
+    public string ResponseType { get; init; } = string.Empty;
+
+    [JsonPropertyName("requestId")]
+    public string RequestId { get; init; } = string.Empty;
+
+    [JsonPropertyName("status")]
+    public string Status { get; init; } = string.Empty;
+
+    [JsonPropertyName("attestation")]
+    public AttestationEnvelopeDto? Attestation { get; init; }
+
+    [JsonPropertyName("error")]
+    public AttestationErrorDto? Error { get; init; }
+}
+
+/// <summary>
+/// Subject for attestation.
+/// </summary>
+internal sealed class AttestationSubjectDto
+{
+    [JsonPropertyName("name")]
+    public string Name { get; init; } = string.Empty;
+
+    [JsonPropertyName("digest")]
+    public Dictionary<string, string> Digest { get; init; } = new();
+}
+
+/// <summary>
+/// Signing options for attestation.
+/// </summary>
+internal sealed class SigningOptionsDto
+{
+    [JsonPropertyName("keyId")]
+    public string? KeyId { get; init; }
+
+    [JsonPropertyName("provider")]
+    public string? Provider { get; init; }
+
+    [JsonPropertyName("algorithm")]
+    public string? Algorithm { get; init; }
+
+    [JsonPropertyName("transparencyLog")]
+    public bool TransparencyLog { get; init; }
+
+    [JsonPropertyName("timestampAuthority")]
+    public string? TimestampAuthority { get; init; }
+}
+
+/// <summary>
+/// DSSE attestation envelope from response.
+/// </summary>
+internal sealed class AttestationEnvelopeDto
+{
+    [JsonPropertyName("payloadType")]
+    public string PayloadType { get; init; } = "application/vnd.in-toto+json";
+
+    [JsonPropertyName("payload")]
+    public string Payload { get; init; } = string.Empty;
+
+    [JsonPropertyName("signatures")]
+    public IReadOnlyList<DsseSignatureDto> Signatures { get; init; } = Array.Empty<DsseSignatureDto>();
+
+    [JsonPropertyName("envelopeDigest")]
+    public string? EnvelopeDigest { get; init; }
+
+    [JsonPropertyName("transparencyLogEntry")]
+    public TransparencyLogEntryDto? TransparencyLogEntry { get; init; }
+}
+
+/// <summary>
+/// DSSE signature.
+/// </summary>
+internal sealed class DsseSignatureDto
+{
+    [JsonPropertyName("keyid")]
+    public string KeyId { get; init; } = string.Empty;
+
+    [JsonPropertyName("sig")]
+    public string Sig { get; init; } = string.Empty;
+}
+
+/// <summary>
+/// Transparency log entry from Rekor.
+/// </summary>
+internal sealed class TransparencyLogEntryDto
+{
+    [JsonPropertyName("logIndex")]
+    public long LogIndex { get; init; }
+
+    [JsonPropertyName("logId")]
+    public string? LogId { get; init; }
+
+    [JsonPropertyName("integratedTime")]
+    public DateTimeOffset? IntegratedTime { get; init; }
+
+    [JsonPropertyName("inclusionProof")]
+    public string? InclusionProof { get; init; }
+
+    [JsonPropertyName("entryUri")]
+    public string? EntryUri { get; init; }
+}
+
+/// <summary>
+/// Error from attestation operation.
+/// </summary>
+internal sealed class AttestationErrorDto
+{
+    [JsonPropertyName("code")]
+    public string Code { get; init; } = string.Empty;
+
+    [JsonPropertyName("message")]
+    public string Message { get; init; } = string.Empty;
+
+    [JsonPropertyName("details")]
+    public Dictionary<string, object>? Details { get; init; }
+}
+
+/// <summary>
+/// Options for the attest sign command.
+/// </summary>
+internal sealed class AttestSignOptions
+{
+    public string PredicatePath { get; init; } = string.Empty;
+    public string PredicateType { get; init; } = string.Empty;
+    public string SubjectName { get; init; } = string.Empty;
+    public string SubjectDigest { get; init; } = string.Empty;
+    public string? KeyId { get; init; }
+    public bool Keyless { get; init; }
+    public bool UseRekor { get; init; }
+    public string? OutputPath { get; init; }
+    public string Format { get; init; } = "dsse";
+}
+
+/// <summary>
+/// Result from attest sign command.
+/// </summary>
+internal sealed class AttestSignResult
+{
+    [JsonPropertyName("success")]
+    public bool Success { get; init; }
+
+    [JsonPropertyName("envelopePath")]
+    public string? EnvelopePath { get; init; }
+
+    [JsonPropertyName("envelopeDigest")]
+    public string? EnvelopeDigest { get; init; }
+
+    [JsonPropertyName("predicateType")]
+    public string PredicateType { get; init; } = string.Empty;
+
+    [JsonPropertyName("subjectName")]
+    public string SubjectName { get; init; } = string.Empty;
+
+    [JsonPropertyName("subjectDigest")]
+    public string SubjectDigest { get; init; } = string.Empty;
+
+    [JsonPropertyName("keyId")]
+    public string? KeyId { get; init; }
+
+    [JsonPropertyName("transparencyLogEntry")]
+    public TransparencyLogEntryDto? TransparencyLogEntry { get; init; }
+
+    [JsonPropertyName("error")]
+    public string? Error { get; init; }
+}