Enhancement Request: Remove the Input section from the job file

I would like it if the job file only contained the target and output section. Why do I have to specify an input section? Shouldn't Dexter be able to figure that out based on the reports I've requested?

I've spent many hours running and waiting for Dexter reports and it was probably spending the time querying data I didn't need.

Start by tracing how Dexter reads the job file's input, target, and output sections, then inspect how requested reports identify the data they need. Done means the input section can be removed without losing required data selection and reports avoid querying unneeded data, with tests covering the new job-file behavior.

Written by the indexing model from the issue text.