Revert "utils: Do not enable event cache storage"

This reverts commit 37fc796c9c.

src/utils/matrix/mod.rs

@@ -329,6 +329,10 @@ pub async fn client_with_stored_session(
 
     client.restore_session(session_data).await?;
 
+    if let Err(error) = client.event_cache().enable_storage() {
+        error!("Failed to enable event cache storage: {error}");
+    }
+
     Ok(client)
 }