insights: historical: add record_time to query runner jobs
Created by: slimsag
This PR adds a record_time
to the query runner jobs table, which allows us to record searches as having happened in the past instead of when we get results back.
No comment is added on the column, because the entire table has a comment pointing to the queryrunner.Job
type which will describe this field in detail soon.
Helps https://github.com/sourcegraph/sourcegraph/issues/18398