fix: Resolve Rust 1.95.0 clippy lint (unnecessary_sort_by) in manager.rs

src/jobs/manager.rs

@@ -222,7 +222,7 @@ impl JobManager {
         }
 
         // Sort by created_at descending (newest first)
-        result.sort_by(|a, b| b.created_at.cmp(&a.created_at));
+        result.sort_by_key(|b| std::cmp::Reverse(b.created_at));
 
         // Apply limit
         result.truncate(limit);