Scorekeeper Refactoring 2/4

[vovacha]

First part #2934

Current PR changes:

• Localize behavior by bringing cron job initialization into the Job class.
• Remove cron/StartCronJobs/, cron/SetupCronJobs/.
• Remove the JobNames enum.
• Add enums: JobStatus, JobEvent, JobKey.
• Clean up job modules.
• Add new tests.

Comments:

• There is almost no need for the events now, since CronJob is a part of the Job class. The only event that makes sense is the JobEvent.Progress event. Job chaining is something to check; that could be a reason for having other event handlers.
• There is no consistency in the logging strategy when working with labels and logging levels.
• There is a redundancy in the exception handling in the job functions.
• Not sure if it's the correct behavior. jobFinished event will immediately overwrite jobErrored status here https://github.com/w3f/1k-validators-be/blob/master/packages/common/src/scorekeeper/jobs/cron/SetupCronJob.ts#L63-L73

Impact:

• Package common
• Package scorekeeper-status-ui

Potential next steps (to be discussed):

• Scorekeeper 1. First part of refactoring.
• Scorekeeper 2. Current PR.
• Scorekeeper 3. Add DB queries to store job status.
• Gateway. Update views to retrieve job statuses from the DB.
• Gateway. Remove Scorekeeper dependency.
• Core. Update Gateway initialization without Scorekeeper.
• Scorekeeper 4. Remove status updates via events and eliminate public interfaces related to the Gateway.
• Gateway. Reduce abstraction layers and code duplication in controllers.
• Gateway. Refactor dynamic routes (e.g., onlyHealth flag).
• Deployment Update. Update deployment scripts to run services separately: Scorekeeper, Gateway, and Telemetry.