Enriches timeline events with collection size information.

Tracks:

• Individual list sizes (with paths)
• Maximum list size
• Total list items count

Usage

Runs automatically during timeline building. Adds collection metrics to each timeline event.

Example Output

%{
  sequence: 3,
  event: "handle_event:filter",
  list_sizes: %{products: 50, "cart.items": 12},
  max_list_size: 50,
  total_list_items: 62
}