Replace structs of Dep<Service> with OnceServices, so each service has a Services reference
Remove service name => Service map
Flatten Services.rooms
Make reqwest Clients lazy initialized (client service)
Upgrade Ruma to present.
The following are intentionally benign for activation in a later commit:
- Hydra backports not default.
- Room version 12 not default.
- Room version 12 not listed as stable.
Do not enable them manually or you can brick your database.
Signed-off-by: Jason Volk <jason@zemos.net>
