900d3041fa
Verdict: appliance guest is LAN-bridged; multicast discovery works only in the guest netns (guest-direct or docker --network host) — default bridge is deaf to LAN multicast. Real samba+wsdd on host-net: Windows 11 ProbeMatch + 445 + SMB round-trip PASS; SSDP MediaServer:1 reaches LAN clients. R-7 => host-network LAN-bound; R-8 Jellyfin-DLNA plausible if host-network. ROADMAP R-6 -> spiked, R-7/R-8 unblocked. S4.4 Explorer render pending human.