[Scrutinizer] Fix undeclared variables in src/ (except Protocol/)

- Use dba::selectFirst to remove intermediate variables `$r`
- Remove unused variable `$url_recipients` in Worker\Dellivery

src/Model/Profile.php

@@ -565,8 +565,10 @@ class Profile
 				Cache::set($cachekey, $r, CACHE_HOUR);
 			}
 		}
+
+		$total = 0;
+		$classtoday = '';
 		if (DBM::is_result($r)) {
-			$total = 0;
 			$now = strtotime('now');
 			$cids = [];