messing with trait objects

src/api/client_server/membership.rs

src/api/client_server/room.rs

src/api/client_server/sync.rs

src/api/ruma_wrapper/axum.rs

src/api/server_server.rs

src/database/key_value/globals.rs

src/database/key_value/media.rs

src/database/key_value/pusher.rs

src/database/key_value/rooms/alias.rs

src/database/key_value/rooms/auth_chain.rs

src/database/key_value/rooms/edus/presence.rs

src/database/key_value/rooms/edus/read_receipt.rs

src/database/key_value/rooms/lazy_load.rs

src/database/key_value/rooms/metadata.rs

src/database/key_value/rooms/search.rs

src/database/key_value/rooms/state_accessor.rs

src/database/key_value/rooms/state_compressor.rs

src/database/key_value/rooms/timeline.rs

src/database/key_value/rooms/user.rs

src/database/key_value/users.rs