1. Add yggdrasil init script (procd) — OpenWrt 25.x package doesn't
include one, causing uci-defaults to fail on `/etc/init.d/yggdrasil
enable` with set -e, leaving script in /etc/uci-defaults/ to re-run
every boot and overwrite all config changes.
2. Delete default br-lan/lan before creating br-private — both bridges
competing for eth0/eth1 port, preventing LAN cable access.
3. Per-device port mapping via /etc/parahub/port_map — filogic devices
(MT3000, MT6000, WR3000) have eth0=WAN, eth1=LAN (opposite of
qualcommax/ath79). Build.sh writes PORT_MAP, uci-defaults reads it.
Also: remove `set -e` from uci-defaults (too fragile for first-boot),
add SSH/HTTP firewall rules on yggdrasil zone for remote management.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>