- Add graph page.
 - Add paragraphs to Statistics and Reproducible Metrics pages.
 - Remove last UTC date from graph and CSV file.
 - Add unit tests to parser.
 - Fix typo in method name.

 - Remove NAs from CSV output.

 - Make two tweaks to the graphing code.

 - Add missing SQL file. Oops.

Implements #25459.

This is a temporary commit! It does work, but it's still missing an
entry in metrics.json as well as documentation on the Reproducible
Metrics page, the Statistics page, and maybe more places.

Fixes #27926.

Fixes #27945.

Still part of #26857.

Implements #27000.

Fixes: #27652

Some relay operators find this section from Relay Search and use it to
request help for their relay on the metrics-team@ list which is
suboptimal. This should help to reduce that.

Fixes: #27635

Fixes: #26983

Fixes the last part of #26190.