Fix: Regression due to httpx updates

[genematx]

Updates of httpx to version 0.28.0 break the existing pagination handling code (and likely other functionality too) where a url is constructed using query parameters that are passed as both, explicitly as part of the url and as kwargs to the httpx.client. This patch fixes this by refactoring the query parameters only as kwargs.

Furthermore, httpx.AsyncClient no longer accepts app as a kwarg; instead, the application needs to be wrapped into an ASGITransport object explicitly before being passed it to AsyncClient.

This behavior has been observed when running a CI/CD pipeline in the main Bluesky repo. After the fix, the previously failing tests have passed (in a local environment).

Checklist

• Add a Changelog entry
• Add the ticket number which this PR closes to the comment section

[danielballan]

This was overdue for a cleanup. Thanks. Looks good once CI is happy.

[genematx]

There are still a few bits that need to be cleaned up (CICD goes into an infinite loop now...) -- working on it. Perhaps this is a reintroduced bug in httpx, but probably still good to systematize our use of query params.

Looks like they are working on it: encode/httpx#3433

[danielballan]

I confirmed that in current httpx any query params here are ignored in params is passed.

In [6]: httpx.get("http://example.com?a=1&b=3", params={'a': 2, 'c': 3}).request.url
Out[6]: URL('http://example.com?a=2&c=3')

In [7]: httpx.get("http://example.com?a=1&b=3").request.url
Out[7]: URL('http://example.com?a=1&b=3')