chore: update api reports and fix some code review comments

Signed-off-by: benjdlambert <ben@blam.sh>

plugins/mcp-backend/report.api.md

@@ -0,0 +1,13 @@
+## API Report File for "@backstage/plugin-mcp-backend"
+
+> Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).
+
+```ts
+import { BackendFeature } from '@backstage/backend-plugin-api';
+
+// @public
+const mcpPlugin: BackendFeature;
+export default mcpPlugin;
+
+// (No @packageDocumentation comment for this package)
+```

plugins/mcp-backend/src/index.ts

@@ -13,4 +13,4 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-export { mcpPlugin } from './plugin';
+export { mcpPlugin as default } from './plugin';

plugins/mcp-backend/src/routers/createSseRouter.ts

@@ -13,7 +13,8 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import Router from 'express-promise-router';
+import PromiseRouter from 'express-promise-router';
+import { Router } from 'express';
 import { McpService } from '../services/McpService';
 import { SSEServerTransport } from '@modelcontextprotocol/sdk/server/sse.js';
 import { HttpAuthService } from '@backstage/backend-plugin-api';
@@ -27,8 +28,8 @@ export const createSseRouter = ({
 }: {
   mcpService: McpService;
   httpAuth: HttpAuthService;
-}) => {
-  const router = Router();
+}): Router => {
+  const router = PromiseRouter();
   const transportsToSessionId = new Map<string, SSEServerTransport>();
 
   router.get('/', async (req, res) => {

plugins/mcp-backend/src/routers/createStreamableRouter.ts

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+import PromiseRouter from 'express-promise-router';
 import { Router } from 'express';
 import { McpService } from '../services/McpService';
 import { StreamableHTTPServerTransport } from '@modelcontextprotocol/sdk/server/streamableHttp.js';
@@ -28,7 +29,7 @@ export const createStreamableRouter = ({
   logger: LoggerService;
   httpAuth: HttpAuthService;
 }): Router => {
-  const router = Router();
+  const router = PromiseRouter();
 
   router.post('/', async (req, res) => {
     try {