Asgi middleware

[beniwohli]

exception tracking is still missing, as I haven't figured out
yet why the exception doesn't bubble up to our middleware

What does this pull request do?

Related issues

closes #1341

[apmmachine]

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• Start Time: 2022-10-11T12:14:31.101+0000

• Duration: 30 min 57 sec

Test stats 🧪

Test	Results
Failed	0
Passed	5029
Skipped	3461
Total	8490

💚 Flaky test report

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[v1v]

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🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (68/68)	💚
Files	100.0% (228/228)	💚
Classes	100.0% (228/228)	💚
Lines	91.011% (18073/19858)	👎 -0.288
Conditionals	74.554% (2801/3757)	👎 -0.053

[basepi]

Looks great!

[basepi]

@beniwohli This just needs a CHANGELOG and it's ready to merge. I also opened #1548 to track the exception handling issue.

[basepi]

@beniwohli We should probably write some docs on this and mark it as beta since it has the exception-handling issue. Also prominently point out that known issue and link to the open issue.