Function assert_can_delete_render 

pub async fn assert_can_delete_render(
    db: &SqlitePool,
    current_user: Uuid,
    render_id: Uuid,
) -> Result<RenderRow, Error>

Permission gate for deleting a render. Personal: must be the owner. Group: must be an owner of the group.

Errors

Returns Error::Forbidden if the user lacks delete permission; Error::NotFound if the render does not exist.