Integrate Asynchronous Logic into Job State Machine

Currently, the job state machine operates statically, lacking asynchronous functions to handle manager logic. This limits its functionality and future extensibility. We should integrate asynchronous logic directly into the state machine, following the pattern demonstrated in the [XState workflow-async-function example](https://github.com/statelyai/xstate/blob/main/examples/workflow-async-function/main.ts). This will enable better control and facilitate future integration with related child machines

Start by locating the job state machine in the jobnik-manager server, then compare its manager logic with the linked XState workflow-async-function example. Determine how asynchronous behavior should fit the existing machine and future child-machine integration. Done means the state machine supports the requested asynchronous manager logic and remains extensible for related child machines.

Written by the indexing model from the issue text.