implement hold discovery dropdown in settings. implement a data privacy export feature

cmd/appview/serve.go

@@ -204,6 +204,7 @@ func serveRegistry(cmd *cobra.Command, args []string) error {
 				HealthChecker:  healthChecker,
 				ReadmeFetcher:  readmeFetcher,
 				Templates:      uiTemplates,
+				DefaultHoldDID: defaultHoldDID,
 			})
 		}
 	}