add progress log for large org asset discovery

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: girish-cheedala

pkg/providers/gcp/gcp.go

@@ -512,6 +512,9 @@ pagination:
 				asset:    asset,
 				resource: resource,
 			})
+			if len(assetInfos)%5000 == 0 {
+				gologger.Info().Msgf("Progress: %d assets fetched so far", len(assetInfos))
+			}
 		}
 	}