120547b1b8
Add community.openwrt collection, dlink host to inventory, openwrt role with system/network/firewall tasks, and two playbooks: dlink-init.yml for one-time bootstrap from factory IP, and openwrt.yml for ongoing idempotent configuration. Network: MGMT untagged + LAN (vlan2) tagged on WAN port trunk to MikroTik ether3. Firewall zones replace factory WAN/LAN with mgmt (input ACCEPT) and lan (forward ACCEPT, AP mode).