Restructure solution layout by module

src/Policy/StellaOps.Policy.Gateway/Contracts/PolicyPackContracts.cs

@@ -0,0 +1,45 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+
+namespace StellaOps.Policy.Gateway.Contracts;
+
+public sealed record PolicyPackSummaryDto(
+    string PackId,
+    string? DisplayName,
+    DateTimeOffset CreatedAt,
+    IReadOnlyList<int> Versions);
+
+public sealed record PolicyPackDto(
+    string PackId,
+    string? DisplayName,
+    DateTimeOffset CreatedAt,
+    IReadOnlyList<PolicyRevisionDto> Revisions);
+
+public sealed record PolicyRevisionDto(
+    int Version,
+    string Status,
+    bool RequiresTwoPersonApproval,
+    DateTimeOffset CreatedAt,
+    DateTimeOffset? ActivatedAt,
+    IReadOnlyList<PolicyActivationApprovalDto> Approvals);
+
+public sealed record PolicyActivationApprovalDto(
+    string ActorId,
+    DateTimeOffset ApprovedAt,
+    string? Comment);
+
+public sealed record PolicyRevisionActivationDto(
+    string Status,
+    PolicyRevisionDto Revision);
+
+public sealed record CreatePolicyPackRequest(
+    [StringLength(200)] string? PackId,
+    [StringLength(200)] string? DisplayName);
+
+public sealed record CreatePolicyRevisionRequest(
+    int? Version,
+    bool RequiresTwoPersonApproval,
+    string InitialStatus = "Approved");
+
+public sealed record ActivatePolicyRevisionRequest(string? Comment);