search and ai stabilization work, localization stablized.

src/__Libraries/StellaOps.Provcache/VeriKeyBuilder.Vex.cs

@@ -2,6 +2,7 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
+using static StellaOps.Localization.T;
 
 namespace StellaOps.Provcache;
 
@@ -15,7 +16,7 @@ public sealed partial class VeriKeyBuilder
     public VeriKeyBuilder WithVexHashSet(string vexHashSetHash)
     {
         if (string.IsNullOrWhiteSpace(vexHashSetHash))
-            throw new ArgumentException("VEX hash set hash cannot be null or empty.", nameof(vexHashSetHash));
+            throw new ArgumentException(_t("common.provcache.vex_hash_required"), nameof(vexHashSetHash));
 
         _vexHashSetHash = NormalizeHash(vexHashSetHash);
         return this;