Returns the current GPU's model name normalised to a filesystem-safe slug
(lowercase, non-alphanumeric runs replaced with -, leading/trailing -
stripped). Used as the directory name under benchmarks/results/.
Returns string|null
the slug string, or null if the adapter exposes no device name
Returns the current GPU's model name normalised to a filesystem-safe slug (lowercase, non-alphanumeric runs replaced with
-, leading/trailing-stripped). Used as the directory name underbenchmarks/results/.