Mautrix

* Added utility for measuring async method time in prometheus.

* Made `sender_device` optional in decrypted olm events.
* Added opt_prometheus utility for using prometheus as an optional dependency.
* Added Matrix event time processing metric for bridges when prometheus is installed.

* Added support for telling the user about decryption errors in bridge module.

* Added bridge config option to pass custom arguments to SQLAlchemy's `create_engine`.

* Added optional automatic prometheus config to the `Program` class.

* Added support for e2ee key sharing in `OlmMachine`
(both sending and responding to requests).
* Added option for automatically sharing keys from bridges.
* Added account data get/set methods for `ClientAPI`.
* Added helper for bridges to update `m.direct` account data.
* Added default user ID and alias namespaces for bridge registration generation.
* Added asyncpg-based client state store implementation.
* Added filtering query parameters to `ClientAPI.get_members`.
* Changed attachment encryption methods to return `EncryptedFile` objects
instead of dicts.
* Changed `SimpleLock` to use `asyncio.Event` instead of `asyncio.Future`.
* Made SQLAlchemy optional for bridges.
* Fixed error when profile endpoint responses are missing keys.