backend-dynamic-feature-service: wait for changes to be tracked

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

.changeset/twelve-eyes-stare.md

@@ -0,0 +1,5 @@
+---
+'@backstage/backend-dynamic-feature-service': patch
+---
+
+Make sure changes are successfully tracked before starting up scanner.

packages/backend-dynamic-feature-service/src/manager/plugin-manager.ts

@@ -68,7 +68,7 @@ export class DynamicPluginManager implements DynamicPluginProvider {
       preferAlpha: options.preferAlpha,
     });
     const scannedPlugins = (await scanner.scanRoot()).packages;
-    scanner.trackChanges();
+    await scanner.trackChanges();
     const moduleLoader =
       options.moduleLoader ||
       new CommonJSModuleLoader({ logger: options.logger });