Prometheus Exporter - New .MapPrometheusScrapingEndpoint() Extension Method

[hannahchan]

Fixes #3267

Changes

Adds a new extension method MapPrometheusScrapingEndpoint() that extends off IEndpointRouteBuilder instead of IApplicationBuilder and returns an IEndpointConventionBuilder for chaining.

Please squash merge.

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: hannahchan / name: Hannah Chan (7529346, b6af4dd, 412c95b, 86ae8a4)

[CodeBlanch]

LGTM

[CodeBlanch]

@tillig If you have time would you mind also doing a review of this?

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (main@c90ab4a). Click here to learn what that means.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #3295   +/-   ##
=======================================
  Coverage        ?   85.72%           
=======================================
  Files           ?      267           
  Lines           ?     9383           
  Branches        ?        0           
=======================================
  Hits            ?     8044           
  Misses          ?     1339           
  Partials        ?        0           

Impacted Files	Coverage Δ
...rometheusExporterEndpointRouteBuilderExtensions.cs	100.00% <100.00%> (ø)

[tillig]

Just one comment about where services get resolved from, otherwise LGTM.

[cijothomas]

@hannahchan could you fix the conflicts?
We just finished 1.3.0 release, and I am back to reviewing/merging all pending PRs..:)

[hannahchan]

@cijothomas Yep done. Please let me know if you need anything else.

[hannahchan]

Hi all,

The build failed and I think I've just fixed the issues I had with PublicAPI.Unshipped.txt. Please take a look when you get the chance.

Side note, the code fixes for Microsoft.CodeAnalysis.PublicApiAnalyzers don't seem to work in vscode.