PhaseG0: 网关核心 — 7接口+10模型+3基础设施 编译通过

gateway/src/IntegrationGateway.Core/Models/MetadataPushResult.cs

@@ -0,0 +1,7 @@
+namespace IntegrationGateway.Core.Models;
+
+public class MetadataPushResult
+{
+    public bool Success { get; set; }
+    public string? Message { get; set; }
+}