* Make userapi responsible for checking access tokens
There's still plenty of dependencies on account/device DBs, but this
is a start. This is a breaking change as it adds a required config
value `listen.user_api`.
* Cleanup
* Review comments and test fix
* Groundwork for send-to-device messaging
* Update sample config
* Add unstable routing for now
* Send to device consumer in sync API
* Start the send-to-device consumer
* fix indentation in dendrite-config.yaml
* Create send-to-device database tables, other tweaks
* Add some logic for send-to-device messages, add them into sync stream
* Handle incoming send-to-device messages, count them with EDU stream pos
* Undo changes to test
* pq.Array
* Fix sync
* Logging
* Fix a couple of transaction things, fix client API
* Add send-to-device test, hopefully fix bugs
* Comments
* Refactor a bit
* Fix schema
* Fix queries
* Debug logging
* Fix storing and retrieving of send-to-device messages
* Try to avoid database locks
* Update sync position
* Use latest sync position
* Jiggle about sync a bit
* Fix tests
* Break out the retrieval from the update/delete behaviour
* Comments
* nolint on getResponseWithPDUsForCompleteSync
* Try to line up sync tokens again
* Implement wildcard
* Add all send-to-device tests to whitelist, what could possibly go wrong?
* Only care about wildcard when targeted locally
* Deduplicate transactions
* Handle tokens properly, return immediately if waiting send-to-device messages
* Fix sync
* Update sytest-whitelist
* Fix copyright notice (need to do more of this)
* Comments, copyrights
* Return errors from Do, fix dendritejs
* Review comments
* Comments
* Constructor for TransactionWriter
* defletions
* Update gomatrixserverlib, sytest-blacklist
* Server key API (works for monolith but not for polylith yet)
* Re-enable caching on server key API component
* Groundwork for HTTP APIs for server key API
* Hopefully implement HTTP for server key API
* Simplify public key request marshalling from map keys
* Update gomatrixserverlib
* go mod tidy
* Common -> internal
* remove keyring.go
* Update Docker Hub for server key API
* YAML is funny about indentation
* Wire in new server key API into hybrid monolith mode
* Create maps
* Route server key API endpoints on internal API mux
* Fix server key API URLs
* Add fetcher behaviour into server key API implementation
* Return error if we failed to fetch some keys
* Return results anyway
* Move things about a bit
* Remove unused code
* Fix comments, don't use federation sender URL in polylith mode
* Add server_key_api to sample config
* Review comments
* HTTP API to cache keys that have been requested
* Overwrite server_key_api listen in monolith hybrid mode
