Support NpgsqlUIntTypeMapping for the compiled model

Fixes npgsql#2992

Author: roji

src/EFCore.PG/Design/Internal/NpgsqlCSharpRuntimeAnnotationCodeGenerator.cs

@@ -49,6 +49,7 @@ public override bool Create(
         var npgsqlDbTypeBasedDefaultInstance = typeMapping switch
         {
             NpgsqlStringTypeMapping => NpgsqlStringTypeMapping.Default,
+            NpgsqlUIntTypeMapping => NpgsqlUIntTypeMapping.Default,
             NpgsqlULongTypeMapping => NpgsqlULongTypeMapping.Default,
             // NpgsqlMultirangeTypeMapping => NpgsqlMultirangeTypeMapping.Default,
             _ => (INpgsqlTypeMapping?)null

src/EFCore.PG/Storage/Internal/Mapping/NpgsqlUIntTypeMapping.cs

@@ -10,6 +10,14 @@ namespace Npgsql.EntityFrameworkCore.PostgreSQL.Storage.Internal.Mapping;
 /// </summary>
 public class NpgsqlUIntTypeMapping : NpgsqlTypeMapping
 {
+    /// <summary>
+    ///     This is an internal API that supports the Entity Framework Core infrastructure and not subject to
+    ///     the same compatibility standards as public APIs. It may be changed or removed without notice in
+    ///     any release. You should only use it directly in your code with extreme caution and knowing that
+    ///     doing so can result in application failures when updating to a new Entity Framework Core release.
+    /// </summary>
+    public static NpgsqlUIntTypeMapping Default { get; } = new("xid", NpgsqlDbType.Xid);
+
     /// <summary>
     ///     This is an internal API that supports the Entity Framework Core infrastructure and not subject to
     ///     the same compatibility standards as public APIs. It may be changed or removed without notice in