Expose updated_at detail and render correctly

[DeeTheDev]

Fixes #737

Some 'updated_at' values were not being exposed for some resources by the backend, which means:

1. Their value is undefined
2. The frontend dayjsOrNull(date) function fails since the date value is undefined, and function checks for null only

Solution is to ensure we expose updated_at when we intend to use/render it, and use dayjsOrNull in the frontend to render the value correctly.

Also removes 'updated at' field from the organization page membership related list. Don't think we need it there.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.74%. Comparing base (5ce63c4) to head (c29ba42).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #744   +/-   ##
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  Coverage   98.73%   98.74%           
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  Files         468      468           
  Lines       21342    21353   +11     
=======================================
+ Hits        21073    21084   +11     
  Misses        269      269           

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[DeeTheDev]

@rgalanakis I noticed that AutoExposeDetails backend method is used in many places, but we only use updated_at in 3 places in the admin portal, and external_links in 2 places (funding/payout transaction detail pages). So there's probably some more cleanup necessary there. Do you suggest I open another issue for this or fix here?

[rgalanakis]

@rgalanakis I noticed that AutoExposeDetails backend method is used in many places, but we only use updated_at in 3 places in the admin portal, and external_links in 2 places (funding/payout transaction detail pages). So there's probably some more cleanup necessary there. Do you suggest I open another issue for this or fix here?

No, I think when it makes sense we can just do a pass and add it to all the missing detail pages, it isn't a big deal right now. Probably have some standard way to do it.