Add jobs post server start.

Currently we use a blocking scheduler from `apscheduler`. That limits us to only add jobs before the scheduler has to start. This is pretty big limitation.

Look at the current use of `apscheduler` in the codebase, likely in a server startup module. Understand how jobs are currently added before scheduler start. Research `apscheduler`'s non-blocking or dynamic job addition capabilities. The goal is to modify the scheduling logic to allow adding jobs after the server has started.

Scritto dal modello di indicizzazione a partire dal testo della issue.