Introduce the ability to assign the id variable universally

[m-visintini]

User can select id variable in the sidebar in the check selection tab.

HFCS cannot be run until ID variable is selected.

ID variable field was removed from Duplicate and Outlier checks cards.

ID variable is downloaded as csv with the rest of the parameters and can be reimported as per pre-existing behavior.

Updated all info tooltips to match new UX.

[mariarrt94]

@m-visintini This is great! I only have one comment on this particular PR regarding the unit of observation:

1. The unit of observation is not automatically programmed as hhid, which I think is fine since the unit of observation isn’t always the same as hhid. However, we should include a note in the instructions (using the question mark sign) explaining what this variable is and mentioning that it could be hhid.

2. For duplicate values, the hhid is no longer needed in the selection of duplicate IDs when downloading and uploading parameters (using that feature). As a result, the duplicates check isn’t automatically enabled since only hhid is required. If you don't select anything additional and only use the default, this check won’t be triggered. This isn’t a problem, but it would be helpful to mention it somehow in the instructions. This is more of a note for me.

3. Not related to this feature. While reviewing, I noticed some bugs related to downloading and uploading parameters. Specifically, the selection of the IQR/SD method isn’t being tracked correctly.

Apart from these points, everything looks good, and I think we can proceed to merge main into this PR and then this PR back into main (or follow whichever conflict resolution method you prefer).

Let me know if it would be useful to chat. Great work—thanks again!

[m-visintini]

Thank you!

A couple of follow up questions:

• For 1.: can add a note for now, however I think we need to review the Unit of Observation check as a whole. At the moment, it does not provide any summarization - it just shows the entire dataset. Maybe we can have a discussion about this. I can add a comment now anyways for completeness.
• For 2.: The current implemented behavior is: (1) Duplicate check is selected by default, but RUN button is disabled (2) when the user selects an ID variable, the RUN button is enabled. If I click it without changing anything else, HFCS runs the duplicate check on ID. What do you suggest as intended behavior?
• For 3.: Looks like method and multiplier were never included in the export to begin with. I will create a separate issue.

I will merge main into this branch as soon as I have fixed these things, and then commit again!