I was able to find articles on the web explaining how to use DNN scheduling & how to write classes for the same.

However, all those articles explained registering the scheduler class manually. No article explained the how to automatically register a scheduled task.

So, does DNN provide any separate scheduler kind of a thing? i.e. like we package modules, skins, is there any way of packaging a schedule class independently?

If no, then I believe, a scheduler needs to be installed with some module. Is there any module manifest file setting, that registers the scheduler class with DNN automatically during module installation process?

I dont think it is a good idea to insert data manually into DNN tables. Instead I would recommed implementing IUpgradable on Module Controller class, and use the appropriate DNN's controller to register a scheduler.

But coming back to my original question, your reply makes it sound like there is no separate stand-alone installer package for a scheduler (like modules, skins, containers etc.).

That also means that schedulers always have to piggy-back on a module to install them into DNN. And there is no automatic way to register them while module installation. Am I correct??