fix: export oauth2Proxy as default so DI discovers it

Signed-off-by: djamaile <rdjamaile@gmail.com>

.changeset/chilly-lies-collect.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-auth-backend-module-oauth2-proxy-provider': patch
+---
+
+Exported the plugin as default so it gets discovered by using `featureDiscoveryServiceFactory()`

plugins/auth-backend-module-oauth2-proxy-provider/api-report.md

@@ -10,7 +10,8 @@ import { IncomingHttpHeaders } from 'http';
 import { ProxyAuthenticator } from '@backstage/plugin-auth-node';
 
 // @public (undocumented)
-export const authModuleOauth2ProxyProvider: () => BackendFeature;
+const authModuleOauth2ProxyProvider: () => BackendFeature;
+export default authModuleOauth2ProxyProvider;
 
 // @public
 export const OAUTH2_PROXY_JWT_HEADER = 'X-OAUTH2-PROXY-ID-TOKEN';

plugins/auth-backend-module-oauth2-proxy-provider/src/index.ts

@@ -19,7 +19,7 @@
  *
  * @packageDocumentation
  */
-export { authModuleOauth2ProxyProvider } from './module';
+export { authModuleOauth2ProxyProvider as default } from './module';
 export {
   oauth2ProxyAuthenticator,
   OAUTH2_PROXY_JWT_HEADER,