Display start and last updated timestamp on system status page

[tillprochaska]

This exposes the two timestamps (that are already returned per collection by the status API) in the UI. Times are relative (for example "45 seconds ago"), but hovering over them displays the full date/time (for example "Fri, Jun 28, 2024, 5:05 PM").

Todos:

• [x] Figure out if there’s an issue with the start time, possibly related to #3787.

[tillprochaska]

@Rosencrantz I’ve pushed a small update. When testing this with a few larger datasets, I found that the relative times would add a lot of noise. Specifically:

• The rendered relative times update constantly even if the actual values doesn’t change. For example, even if there has been no update to a collection, "last updated now" will become "last updated 3 seconds ago", …
• The length of the rendered values changes frequently which can cause line breaks and layout shifts. This makes it more difficult to visually track a specific row/value, as it’s position on the page changes.

Instead, I’m now displaying just the absolute time (if the date is today) or otherwise the date and time:

[tillprochaska]

This can be merged as soon as https://github.com/alephdata/servicelayer/pull/190 is released

[Rosencrantz]

Nioce update. I approve!