Function render_configuration_warning 

pub fn render_configuration_warning(
    sequence: u64,
    code: &str,
    message: &str,
    path: &str,
) -> String

What: Render one configuration-warning event as a line-terminated JSON object. Why: A warning about configuration itself (a legacy file left beside the JSONC file) belongs on the machine stream as an event, never as free prose there. Unlike the incumbent’s per-policy warn-unsafe warning it has no policy or trigger, so it carries a path instead.

In TS you’d write (pseudocode):

function renderConfigurationWarning(sequence: number, code: string, message: string, path: string): string;