fix some more pedantic clippy lints

Cargo.toml

clippy.toml

src/api/client_server/alias.rs

src/api/client_server/context.rs

src/api/client_server/keys.rs

src/api/client_server/media.rs

src/api/client_server/membership.rs

src/api/client_server/profile.rs

src/api/client_server/room.rs

src/api/client_server/sync.rs

src/database/abstraction/rocksdb.rs

src/database/abstraction/sqlite.rs

src/database/abstraction/watchers.rs

src/database/mod.rs

src/main.rs

src/service/admin/mod.rs

src/service/globals/mod.rs

src/service/mod.rs

src/service/rooms/edus/typing/mod.rs

src/service/rooms/event_handler/mod.rs