Reduce orphan cleanup logging from info to debug

Signed-off-by: Jen Evans <jenevan@rei.com>

.changeset/friendly-frogs-drop.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-catalog-backend': patch
+---
+
+Change orphan cleanup task to debug log from info.

plugins/catalog-backend/src/processing/DefaultCatalogProcessingEngine.ts

@@ -317,7 +317,7 @@ export class DefaultCatalogProcessingEngine implements CatalogProcessingEngine {
       try {
         await this.processingDatabase.transaction(async tx => {
           const n = await this.processingDatabase.deleteOrphanedEntities(tx);
-          this.logger.info(`Deleted ${n} orphaned entities`);
+          this.logger.debug(`Deleted ${n} orphaned entities`);
         });
       } catch (error) {
         this.logger.warn(`Failed to delete orphaned entities`, error);