feat(wecom): 企微 API 插件增加 MCP Streamable HTTP 端点

与 REST/OpenAPI 并存，按实例权限自动 tools/list，免手填工具。

Co-authored-by: Cursor <cursoragent@cursor.com>

server/dukang-api/src/common/interceptors/response.interceptor.test.ts

@@ -0,0 +1,11 @@
+import { describe, expect, it } from 'vitest';
+import { skipWecomPluginResponseWrap } from './response.interceptor';
+
+describe('skipWecomPluginResponseWrap', () => {
+  it('skips OpenAPI and MCP JSON-RPC paths', () => {
+    expect(skipWecomPluginResponseWrap('/api/v1/wecom/plugin/openapi.json')).toBe(true);
+    expect(skipWecomPluginResponseWrap('/api/v1/wecom/plugin/mcp')).toBe(true);
+    expect(skipWecomPluginResponseWrap('/api/v1/wecom/plugin/mcp?x=1')).toBe(true);
+    expect(skipWecomPluginResponseWrap('/api/v1/wecom/plugin/metrics')).toBe(false);
+  });
+});