Tested in two separate Ubuntu 22.04 Docker containers: - Container 1 (online): Clone, setup, fetch 510/510 ✅ - Container 2 (air-gapped): BB_NO_NETWORK=1 fetch 510/510 ✅ Updated verification table with two new rows: - Ubuntu 22.04 host: ✅ - Air-gapped fetch (BB_NO_NETWORK=1): ✅