Make restoreConfigJson, oldConfigJson, updateConfigJson as task args

migrations/schema.sql

@@ -90,11 +90,6 @@ CREATE TABLE IF NOT EXISTS apps(
     dataDir VARCHAR(256) UNIQUE,
     taskId INTEGER, // current task
 
-    // the following fields do not belong here, they can be removed when we use a queue for apptask
-    restoreConfigJson VARCHAR(256), // used to pass backupId to restore from to apptask
-    oldConfigJson TEXT, // used to pass old config to apptask (configure, restore)
-    updateConfigJson TEXT, // used to pass new config to apptask (update)
-
     FOREIGN KEY(taskId) REFERENCES tasks(id),
     PRIMARY KEY(id));