fix qed bot fuzz coverage issue

Author: roberto-bayardo

storage/fuzz/fuzz_targets/ordered_index_operations.rs

@@ -162,8 +162,15 @@ fn fuzz(input: FuzzInput) {
                 }
 
                 IndexOperation::CursorInsert { key, value } => {
-                    // Just use regular insert - simpler and avoids borrow issues
-                    index.insert(key, *value);
+                    if index.get(key).next().is_some() {
+                        let mut cursor = index.get_mut(key).unwrap();
+                        if cursor.next().is_some() {
+                            cursor.insert(*value);
+                            let _ = cursor.next();
+                        }
+                    } else {
+                        index.insert(key, *value);
+                    }
                 }
             }
         }

storage/fuzz/fuzz_targets/unordered_index_operations.rs

@@ -162,8 +162,15 @@ fn fuzz(input: FuzzInput) {
                 }
 
                 IndexOperation::CursorInsert { key, value } => {
-                    // Just use regular insert - simpler and avoids borrow issues
-                    index.insert(key, *value);
+                    if index.get(key).next().is_some() {
+                        let mut cursor = index.get_mut(key).unwrap();
+                        if cursor.next().is_some() {
+                            cursor.insert(*value);
+                            let _ = cursor.next();
+                        }
+                    } else {
+                        index.insert(key, *value);
+                    }
                 }
             }
         }