add a minimal amount of tracing to search jobs

Created by: camdencheek

Search jobs are the best representation of our structure we have at this point, but they are not represented in the traces. This adds some minimal tracing to the top of each of the search jobs so they show up in traces in the same structure they are defined. Also will be useful to help debug a weird issue we're seeing in the k8s deployment.

Now our traces are much more tree-like:

I would not consider this fully instrumented, but it is good enough to help debug for the moment.