Port secuboxd from Debian/Go to OpenWrt shell implementation:
- secuboxd daemon with Unix control socket at /var/run/secuboxd/topo.sock
- secuboxctl CLI compatible with Debian version interface
- Mesh libraries: topology, discovery, election, telemetry, control
- Mesh gate election with weighted scoring (uptime, peers, CPU, memory, role)
- mDNS service discovery (_secubox._udp.local) via umdns
- DID integration via mirrornet identity library
- RPCD handler with 11 ubus methods for LuCI integration
- procd init script with respawn and network triggers
- UCI config sections: mesh, node, telemetry, discovery
Fixes subprocess state access for socat handler by saving daemon state to file.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
