Enable blocking connection for Redis and set async flag to false in identity sync

Author: tacxou

src/app.module.ts

@@ -81,6 +81,7 @@ import { MigrationsModule } from './migrations/migrations.module';
           host: configService.get('ioredis.host'),
           port: configService.get('ioredis.port'),
         },
+        blockingConnection: true,
       }),
     }),
     FactorydriveModule.forRootAsync({

src/core/backends/backends.controller.ts

@@ -84,7 +84,7 @@ export class BackendsController {
   public async syncAllIdentities(@Res() res: Response, @Query('async') asyncQuery: string) {
     const async = /true|on|yes|1/i.test(asyncQuery);
     const data = await this.backendsService.syncAllIdentities({
-      async,
+      async: false,
     });
     return res.status(HttpStatus.ACCEPTED).json({ async, data });
   }