* update Trove classifiers to remove py36

* stop building bionic

* update dh-virtualenv

* newsfragment

* fix newsfragment

* update version refs

* another try at correct tag

* Update changelog

To improve type hints throughout the code.

Fix a type annotation in `test_account_data.py` and remove it from the Mypy exclusion list. (#11657)

Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>

By using cast and making ignores more specific.

Both of those APIs return state events, which will not have bundled
aggregations added anyway.

* update black version

* run updated version of black on code

* newsfragment

* enumerate python versions

Signed-off-by: Andrew Ferrazzutti <fair@miscworks.net>

* remove python 3.6 and postgres 9.6 from github workflow

* remove python 3.6 env from tox

* newsfragment

* correct postgres version

* add py310 to tox env list

postgres 10 _+_

... to work around breakage on buster
(https://github.com/Marco-Sulla/python-frozendict/issues/41)

* Wrap `auth.get_user_by_req` in an opentracing span

give `get_user_by_req` its own opentracing span, since it can result in a
non-trivial number of sub-spans which it is useful to group together.

This requires a bit of reorganisation because it also sets some tags (and may
force tracing) on the servlet span.

* Emit opentracing span for encoding json responses

This can be a significant time sink.

* Rename all sync spans with a prefix

* Write an opentracing span for encoding sync response

* opentracing span to group generate_room_entries

* opentracing spans within sync.encode_response

* changelog

* Use the `trace` decorator instead of context managers

And make bundling aggregations opt-in, instead of opt-out to avoid
having APIs to include extraneous data (and being much heavier than
necessary).

This adds some opentracing annotations to ResponseCache, to make it easier to see what's going on; in particular, it adds a link back to the initial trace which is actually doing the work of generating the response.

* remove `start_active_span_from_request`

Instead, pull out a separate function, `span_context_from_request`, to extract
the parent span, which we can then pass into `start_active_span` as
normal. This seems to be clearer all round.

* Remove redundant tags from `incoming-federation-request`

These are all wrapped up inside a parent span generated in AsyncResource, so
there's no point duplicating all the tags that are set there.

* Leave request spans open until the request completes

It may take some time for the response to be encoded into JSON, and that JSON
to be streamed back to the client, and really we want that inside the top-level
span, so let's hand responsibility for closure to the SynapseRequest.

* opentracing logs for HTTP request events

* changelog

* Disable aggregation bundling on `/sync` responses

A partial revert of #11478. This turns out to have had a significant CPU impact
on initial-sync handling. For now, let's disable it, until we find a more
efficient way of achieving this.

* Fix tests.

Co-authored-by: Patrick Cloke <patrickc@matrix.org>

Instead of returning 404 errors with HTML bodies when an unknown
prefix was requested (e.g. /matrix/client/v1 before Synapse v1.49.0).

Instead of the backported version.

As suggested in https://github.com/matrix-org/matrix-react-sdk/pull/7372#discussion_r769523369

Instead of Iterable since the generators are not allowed due
to the potential for their re-use.

Add experimental support for MSC3202: allowing application services to masquerade as specific devices. (#11538)