style(clippy): auto-fix code style issues and unnecessary map_or allocations detected by cargo clippy

server/src/api/events.rs

@@ -17,10 +17,10 @@ pub async fn wait_for_event_handler(
     loop {
         match rx.recv().await {
             Ok(event) => {
-                let topic_matches = topic.as_ref().map_or(true, |t| t == &event.topic);
+                let topic_matches = topic.as_ref().is_none_or(|t| t == &event.topic);
                 let session_matches = session_id
                     .as_ref()
-                    .map_or(true, |s| Some(s) == event.session_id.as_ref());
+                    .is_none_or(|s| Some(s) == event.session_id.as_ref());
 
                 if topic_matches && session_matches {
                     return axum::Json(event);