Function try_delete_render_file 

pub fn try_delete_render_file(
    storage_dir: &Path,
    filename: &str,
) -> Result<(), Error>

Best-effort delete of a single render file. A missing file is treated as success (the row may have been deleted already). Other errors are returned so the caller can decide whether to surface them or raise the sweeper “dirty” flag for a later retry.

Errors

Returns Error::Io for I/O failures other than NotFound.