Function recipe_standing 

pub fn recipe_standing(root: &Path, record: &GateRecord) -> RecipeStanding

2026-10-02: Compare what record served with what its gate serves in the tree at root: the recipe the BENCH entry for the record’s (hardware, model) names, rendered with the record’s serve overrides (which check_record requires to equal the entry’s pins).

The record side is its served_recipe_sha256; a record without one is Changed.