fix(test): extend cloudflare workers retry to cover full request cycle

test/integration/test/server/cloudflareWorkers.test.ts

@@ -150,28 +150,29 @@ export default {
     it('should handle MCP requests', async () => {
         expect(env).not.toBeNull();
 
-        // Retry connection — wrangler may report "Ready" before it can handle requests
-        let client!: Client;
+        // Retry the full interaction — wrangler may report "Ready" before it can
+        // reliably handle all requests (initialize succeeds but subsequent calls
+        // can still get "Network connection lost." on slower runtimes like Node 20).
         let lastError: unknown;
         for (let attempt = 0; attempt < 5; attempt++) {
+            const client = new Client({ name: 'test-client', version: '1.0.0' });
+            const transport = new StreamableHTTPClientTransport(new URL(`http://127.0.0.1:${PORT}/`));
             try {
-                client = new Client({ name: 'test-client', version: '1.0.0' });
-                const transport = new StreamableHTTPClientTransport(new URL(`http://127.0.0.1:${PORT}/`));
                 await client.connect(transport);
-                lastError = undefined;
-                break;
+                const result = await client.callTool({ name: 'greet', arguments: { name: 'World' } });
+                expect(result.content).toEqual([{ type: 'text', text: 'Hello, World!' }]);
+                await client.close();
+                return;
             } catch (error) {
                 lastError = error;
-                await new Promise(resolve => setTimeout(resolve, 1000));
+                try {
+                    await client.close();
+                } catch {
+                    /* ignore cleanup errors */
+                }
+                if (attempt < 4) await new Promise(resolve => setTimeout(resolve, 1000));
             }
         }
-        if (lastError) {
-            throw lastError;
-        }
-
-        const result = await client.callTool({ name: 'greet', arguments: { name: 'World' } });
-        expect(result.content).toEqual([{ type: 'text', text: 'Hello, World!' }]);
-
-        await client.close();
+        throw lastError;
     }, 30_000);
 });