Using a specific client for addGraphileJobs library function.

### Summary

Hi, just wondering if there is a way to add a job using a pre-existing client using the js library rather than the sql interface? I want to add jobs inside my own transactions. I've resorted to making my own addGraphileJob and addGraphileJobs that are otherwise the same as the originals, but the first arg is a pg PoolClient, which is used to make the query. I feel like I must be missing something because transactional job queuing is a huge benefit of using a postgres job queue.

Thanks.

### Additional context