stabilizaiton work - projects rework for maintenanceability and ui livening

src/__Libraries/StellaOps.PolicyAuthoritySignals.Contracts/PolicyContract.cs

@@ -0,0 +1,42 @@
+using System.Text.Json.Serialization;
+
+namespace StellaOps.PolicyAuthoritySignals.Contracts;
+
+public sealed record PolicyContract
+{
+    private string _policyId = string.Empty;
+
+    [JsonPropertyName("policyId")]
+    public string PolicyId
+    {
+        get => _policyId;
+        init => _policyId = RequireNonEmpty(value, nameof(PolicyId));
+    }
+
+    [JsonPropertyName("version")]
+    public string Version { get; init; } = "0.1-draft";
+
+    [JsonPropertyName("rulesHash")]
+    public string? RulesHash { get; init; }
+
+    public PolicyContract(string policyId, string? version = null, string? rulesHash = null)
+    {
+        PolicyId = policyId;
+        if (!string.IsNullOrWhiteSpace(version))
+        {
+            Version = version;
+        }
+
+        RulesHash = rulesHash;
+    }
+
+    private static string RequireNonEmpty(string value, string paramName)
+    {
+        if (string.IsNullOrWhiteSpace(value))
+        {
+            throw new ArgumentException("Value cannot be null or whitespace.", paramName);
+        }
+
+        return value;
+    }
+}