Improve and standardize run's compilation behaviour when agent is not running

[mmourafiq]

Current behavior

When an agent is misconfigured, and an operation is scheduled by the user or assigned by the system to that agent, the compiler raises an error:

However, when an agent is stopped, either is getting updated by the user or being completely removed), a run might still get compiled using a stale configuration.

Enhancement

Compiler should raise if the agent is not in running state to avoid unexpected behaviour.

Users can still resume the job by providing an updated config (e.g. different run-profile or queue) to assign the run to another agent, or by bringing the agent back to a running state.