stabilizaiton work - projects rework for maintenanceability and ui livening

src/__Libraries/StellaOps.AuditPack/Services/AuditPackBuilder.Digests.cs

@@ -0,0 +1,20 @@
+using System.Security.Cryptography;
+using AuditPackRecord = StellaOps.AuditPack.Models.AuditPack;
+
+namespace StellaOps.AuditPack.Services;
+
+public sealed partial class AuditPackBuilder
+{
+    private static AuditPackRecord WithDigest(AuditPackRecord pack)
+    {
+        var json = CanonicalJson.Serialize(pack with { PackDigest = null, Signature = null });
+        var digest = ComputeDigest(json);
+        return pack with { PackDigest = digest };
+    }
+
+    private static string ComputeDigest(byte[] content)
+    {
+        var hash = SHA256.HashData(content);
+        return Convert.ToHexString(hash).ToLowerInvariant();
+    }
+}