Implement TimeProvider injection for deterministic timestamps across various services and modules

src/__Libraries/StellaOps.Spdx3/Spdx3Parser.cs

@@ -20,6 +20,7 @@ public sealed class Spdx3Parser : ISpdx3Parser
 {
     private readonly ISpdx3ContextResolver _contextResolver;
     private readonly ILogger<Spdx3Parser> _logger;
+    private readonly TimeProvider _timeProvider;
 
     private static readonly JsonSerializerOptions JsonOptions = new()
     {
@@ -34,10 +35,12 @@ public sealed class Spdx3Parser : ISpdx3Parser
     /// </summary>
     public Spdx3Parser(
         ISpdx3ContextResolver contextResolver,
-        ILogger<Spdx3Parser> logger)
+        ILogger<Spdx3Parser> logger,
+        TimeProvider? timeProvider = null)
     {
         _contextResolver = contextResolver;
         _logger = logger;
+        _timeProvider = timeProvider ?? TimeProvider.System;
     }
 
     /// <inheritdoc />
@@ -697,7 +700,7 @@ public sealed class Spdx3Parser : ISpdx3Parser
         var createdStr = GetStringProperty(ciElement, "created");
         if (!DateTimeOffset.TryParse(createdStr, out var created))
         {
-            created = DateTimeOffset.UtcNow;
+            created = _timeProvider.GetUtcNow();
         }
 
         var profileStrings = GetStringArrayProperty(ciElement, "profile");