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src/Scanner/StellaOps.Scanner.WebService/Determinism/DeterministicTimeProvider.cs

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+using System;
+
+namespace StellaOps.Scanner.WebService.Determinism;
+
+/// <summary>
+/// Time provider that always returns a fixed instant, used to enforce deterministic timestamps.
+/// </summary>
+public sealed class DeterministicTimeProvider : TimeProvider
+{
+    private readonly DateTimeOffset _fixedInstantUtc;
+
+    public DeterministicTimeProvider(DateTimeOffset fixedInstantUtc)
+    {
+        _fixedInstantUtc = fixedInstantUtc;
+    }
+
+    public override DateTimeOffset GetUtcNow() => _fixedInstantUtc;
+}