search and ai stabilization work, localization stablized.

src/__Libraries/StellaOps.Audit.ReplayToken/Sha256ReplayTokenGenerator.Canonical.cs

@@ -1,5 +1,6 @@
 using System.Text.Json;
 using System.Text.Json.Serialization;
+using static StellaOps.Localization.T;
 
 namespace StellaOps.Audit.ReplayToken;
 
@@ -51,7 +52,7 @@ public sealed partial class Sha256ReplayTokenGenerator
             var key = kvp.Key.Trim();
             if (!seen.Add(key))
             {
-                throw new ArgumentException($"AdditionalContext contains duplicate key after normalization: '{key}'.", nameof(values));
+                throw new ArgumentException(_t("common.audit.replay_token_duplicate_context_key", key), nameof(values));
             }
 
             normalized.Add(new KeyValuePair<string, string>(key, kvp.Value?.Trim() ?? string.Empty));