fix: don't remove timeouts when a member leaves a server (#409)

crates/daemons/crond/src/tasks/mod.rs

@@ -1,2 +1,3 @@
 pub mod file_deletion;
 pub mod prune_dangling_files;
+pub mod prune_members;

crates/daemons/crond/src/tasks/prune_members.rs

@@ -0,0 +1,18 @@
+use std::time::Duration;
+
+use log::warn;
+use revolt_database::Database;
+use revolt_result::Result;
+use tokio::time::sleep;
+
+pub async fn task(db: Database) -> Result<()> {
+    loop {
+        let success = db.remove_dangling_members().await;
+        if let Err(s) = success {
+            revolt_config::capture_error(&s);
+            warn!("Failed to prune dangling members: {:?}", &s);
+        }
+
+        sleep(Duration::from_secs(90)).await;
+    }
+}