fix(middleware): stop bundling workspace type graphs into .d.ts (avoids dts-gen OOM) (#2339)

packages/middleware/express/tsdown.config.ts

@@ -12,11 +12,11 @@ export default defineConfig({
     shims: true,
     dts: {
         resolver: 'tsc',
+        // Keep workspace deps as external imports in the bundled .d.ts instead of
+        // inlining their type graph — see ../node/tsdown.config.ts for the rationale.
         compilerOptions: {
-            baseUrl: '.',
-            paths: {
-                '@modelcontextprotocol/server': ['../server/src/index.ts']
-            }
+            paths: {},
+            preserveSymlinks: true
         }
     }
 });