Support associated data in ESAP queries

Often, a user will first run a query to find the core science data they are interested in (e.g., an image of their favourite object), but then will want to download not just that data but related data. This would include, say, calibration products which can be applied to the science data.

For example, see https://archive.eso.org/downloadportal/a87339c7-1bcc-48d9-8cc2-ac8577d4f183 — for a given science product, the ESO archive here provides the option to download:

• Associated processed calibrations
• Raw calibrations
• Night logs

ESAP should similarly allow the user to “drill down” from their science results to access related products without needing to run an entirely new query.