[catalog] Make unprocessed entities visible

Create an API route to fetch failed and pending entities, as well as a frontend plugin to view them.

Added a broken entity to the sample data.

Signed-off-by: Rickard Dybeck <dybeck@spotify.com>

packages/backend/package.json

@@ -40,6 +40,7 @@
     "@backstage/plugin-azure-sites-backend": "workspace:^",
     "@backstage/plugin-badges-backend": "workspace:^",
     "@backstage/plugin-catalog-backend": "workspace:^",
+    "@backstage/plugin-catalog-backend-module-unprocessed": "workspace:^",
     "@backstage/plugin-catalog-node": "workspace:^",
     "@backstage/plugin-code-coverage-backend": "workspace:^",
     "@backstage/plugin-devtools-backend": "workspace:^",

packages/backend/src/plugins/catalog.ts

@@ -19,6 +19,7 @@ import { ScaffolderEntitiesProcessor } from '@backstage/plugin-scaffolder-backen
 import { Router } from 'express';
 import { PluginEnvironment } from '../types';
 import { DemoEventBasedEntityProvider } from './DemoEventBasedEntityProvider';
+import { UnprocessedEntitesModule } from '@backstage/plugin-catalog-backend-module-unprocessed';
 
 export default async function createPlugin(
   env: PluginEnvironment,
@@ -34,6 +35,13 @@ export default async function createPlugin(
   builder.addEntityProvider(demoProvider);
 
   const { processingEngine, router } = await builder.build();
+
+  const unprocessed = new UnprocessedEntitesModule(
+    await env.database.getClient(),
+    router,
+    env.logger,
+  );
+  unprocessed.registerRoutes();
   await processingEngine.start();
   return router;
 }