fix(generator): 解决重复引用路径生成成员名称不稳定问题

- 使用 TryGetValue 方法替代 ContainsKey 检查避免多次访问字典
- 重用跟踪的重复计数确保重复引用路径保持生成的成员名称稳定
- 修复重复计数递增逻辑确保正确的序号生成
- 简化重复计数器的使用方式提高代码可读性
- 移除文件末尾多余空行保持代码整洁

GFramework.SourceGenerators/Config/SchemaConfigGenerator.cs

@@ -939,11 +939,13 @@ public sealed class SchemaConfigGenerator : IIncrementalGenerator
         foreach (var referenceSeed in EnumerateReferenceSeeds(rootObject.Properties))
         {
             var baseMemberName = BuildReferenceMemberName(referenceSeed.DisplayPath);
-            if (memberNameCounts.ContainsKey(baseMemberName))
+            if (memberNameCounts.TryGetValue(baseMemberName, out var duplicateCount))
             {
-                memberNameCounts[baseMemberName]++;
+                // Reuse the tracked duplicate count so repeated reference paths keep their generated member names stable.
+                duplicateCount++;
+                memberNameCounts[baseMemberName] = duplicateCount;
                 baseMemberName =
-                    $"{baseMemberName}{memberNameCounts[baseMemberName].ToString(CultureInfo.InvariantCulture)}";
+                    $"{baseMemberName}{duplicateCount.ToString(CultureInfo.InvariantCulture)}";
             }
             else
             {