Refactor code structure for improved readability and maintainability; optimize performance in key functions.

src/__Libraries/StellaOps.Replay/Models/ReplayModels.cs

@@ -0,0 +1,54 @@
+using System.Collections.Immutable;
+using StellaOps.Evidence.Models;
+
+namespace StellaOps.Replay.Models;
+
+public sealed record ReplayResult
+{
+    public required string RunId { get; init; }
+    public bool Success { get; init; }
+    public string? VerdictJson { get; init; }
+    public string? VerdictDigest { get; init; }
+    public EvidenceIndex? EvidenceIndex { get; init; }
+    public DateTimeOffset ExecutedAt { get; init; }
+    public long DurationMs { get; init; }
+    public IReadOnlyList<string>? Errors { get; init; }
+
+    public static ReplayResult Failed(string runId, string message, IReadOnlyList<string> errors) =>
+        new()
+        {
+            RunId = runId,
+            Success = false,
+            Errors = errors.Prepend(message).ToList(),
+            ExecutedAt = DateTimeOffset.UtcNow
+        };
+}
+
+public sealed record DeterminismCheckResult
+{
+    public bool IsDeterministic { get; init; }
+    public string? DigestA { get; init; }
+    public string? DigestB { get; init; }
+    public IReadOnlyList<JsonDifference> Differences { get; init; } = [];
+}
+
+public sealed record JsonDifference(string Path, string Description);
+
+public sealed record ReplayOptions
+{
+    public bool UseFrozenTime { get; init; } = true;
+    public bool VerifyDigests { get; init; } = true;
+    public bool CaptureEvidence { get; init; } = true;
+}
+
+public sealed record ValidationResult(bool IsValid, IReadOnlyList<string> Errors);
+
+public sealed record LoadResult<T>
+{
+    public bool Success { get; init; }
+    public T? Value { get; init; }
+    public string? Error { get; init; }
+
+    public static LoadResult<T> Ok(T value) => new() { Success = true, Value = value };
+    public static LoadResult<T> Fail(string error) => new() { Success = false, Error = error };
+}

src/__Libraries/StellaOps.Replay/Models/ScanModels.cs

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+using StellaOps.Evidence.Models;
+using StellaOps.Testing.Manifests.Models;
+
+namespace StellaOps.Replay.Models;
+
+public sealed record ScanResult(
+    object Verdict,
+    EvidenceIndex? EvidenceIndex,
+    long DurationMs);
+
+public sealed record ScannerOptions
+{
+    public required FeedSnapshot FeedSnapshot { get; init; }
+    public required PolicySnapshot PolicySnapshot { get; init; }
+    public required CryptoProfile CryptoProfile { get; init; }
+    public long? PrngSeed { get; init; }
+    public DateTimeOffset? FrozenTime { get; init; }
+    public required string CanonicalizationVersion { get; init; }
+}