logs: use %o to format error

otherwise, they are printed as multi-line and this messes up tail+date formatting

src/provision.js

@@ -117,7 +117,7 @@ async function setup(domainConfig, sysinfoConfig, auditSource) {
 
         safe(setupTask(domain, auditSource), { debug }); // now that args are validated run the task in the background
     } catch (error) {
-        debug('setup: error', error);
+        debug('setup: error. %o', error);
         gProvisionStatus.setup.active = false;
         gProvisionStatus.setup.errorMessage = error.message;
         throw error;