feat(server): custom library scanning interval (#4390)

* add automatic library scan config options

* add validation

* open api

* use CronJob instead of cron-validator

* fix tests

* catch potential error of the library scan initialization

* better description for input field

* move library scan job initialization to server app service

* fix tests

* add comments to all parameters of cronjob contructor

* make scan a child of a more general library object

* open api

* chore: cleanup

* move cronjob handling to job repoistory

* web: select for common cron expressions

* fix open api

* fix tests

* put scanning settings in nested accordion

* fix system config validation

* refactor, tests

---------

Co-authored-by: Jason Rasmussen <jrasm91@gmail.com>

server/src/domain/repositories/job.repository.ts

@@ -111,6 +111,9 @@ export const IJobRepository = 'IJobRepository';
 
 export interface IJobRepository {
   addHandler(queueName: QueueName, concurrency: number, handler: JobItemHandler): void;
+  addCronJob(name: string, expression: string, onTick: () => void, start?: boolean): void;
+  updateCronJob(name: string, expression?: string, start?: boolean): void;
+  deleteCronJob(name: string): void;
   setConcurrency(queueName: QueueName, concurrency: number): void;
   queue(item: JobItem): Promise<void>;
   pause(name: QueueName): Promise<void>;