Pass structlog context through job board and worker

[jimbobhickville]

When using structlog and the job board, there's a desire to push the structlog context so that logging messages in the conductor and worker for a specific job share the logging context of the job submitting code. We should add a configuration option to the job board that will capture and pass along the logging context to the conductor and worker, which will then re-enable structlog with that same context information.