improvement: bug fixes and refactors

- power level content override adds to the default event instead of
replacing it
- sending code refactored to make edus possible
- remove presence events when restarting conduit
- remove room_id field from read receipts over /sync
- handle incoming read receipts
- fix array bounds bug in server_server.rs

src/error.rs

@@ -1,4 +1,4 @@
-use log::error;
+use log::{error, warn};
 use ruma::api::client::{error::ErrorKind, r0::uiaa::UiaaInfo};
 use thiserror::Error;
 
@@ -92,6 +92,8 @@ where
             _ => (Unknown, StatusCode::INTERNAL_SERVER_ERROR),
         };
 
+        warn!("{}: {}", status_code, message);
+
         RumaResponse::from(RumaError {
             kind,
             message,