Add opt-in anonymous stats reporting (#2249)

* Initial phone home stats queries

* Add userAgent to UpdateDeviceLastSeen
Add new Table for tracking daily user vists

* Add user_daily_visits table

* Fix queries

* userapi stats tables & queries

* userapi interface and internal api

* sycnapi stats queries

* testing phone home stats

* Add complete config to syncapi

* add missing files

* Fix queries

* Send empty request

* Add version & monolith stats

* Add configuration for phone home stats

* Move WASM to its own file, add config and comments

* Add tracing methods

* Add total rooms

* Add more fields, actually send data somewhere

* Move stats to the userapi

* Move phone home stats to util package

* Cleanup

* Linter & parts of GH comments

* More GH comments changes
- Move comments to SQL statements
- Shrink interface, add struct for stats
- No fatal errors, use defaults

* Be more explicit when querying

* Fix wrong calculation & wrong query params
Add tests

* Add Windows stats

* ADd build constraint

* Use new testing structure
Fix issues with getting values when using SQLite
Fix wrong AddDate value
Export UpdateUserDailyVisits

* Fix query params

* Fix test

* Add comment about countR30UsersSQL and countR30UsersV2SQL; fix test

* Update config

* Also update example config file

* Use OS level proxy, update logging

Co-authored-by: kegsay <kegan@matrix.org>

syncapi/sync/requestpool.go

@@ -182,6 +182,7 @@ func (rp *RequestPool) updateLastSeen(req *http.Request, device *userapi.Device)
 		UserID:     device.UserID,
 		DeviceID:   device.ID,
 		RemoteAddr: remoteAddr,
+		UserAgent:  req.UserAgent(),
 	}
 	lsres := &userapi.PerformLastSeenUpdateResponse{}
 	go rp.userAPI.PerformLastSeenUpdate(req.Context(), lsreq, lsres) // nolint:errcheck