Function get_needed_components_for_request 

pub fn get_needed_components_for_request(
    protocol: &WebUIProtocol,
    entry_id: &str,
    request_path: &str,
    inventory_hex: &str,
    component_index: &HashMap<String, u32>,
) -> Result<(Vec<String>, String), HandlerError>

Walk the protocol from the persistent entry_id and return the component templates needed for the current request_path.

Returns (needed_names, updated_inventory_hex).