docs: pack README key files - LAN-IP resolver and netinfo helper

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/README.md

@@ -34,6 +34,7 @@ The manager calls the API **same-origin, with relative paths**. The waiter app r
 | File | Why it matters |
 |---|---|
 | `local_backend/main.py` | App setup, router registration, CORS, **`_run_migrations()`** |
+| `local_backend/services/lan_ip.py`, `services/netinfo_helper.py` | Which LAN IP phones get (override → live detection → `HOST_IP`); the `netinfo` host-network helper |
 | `local_backend/services/cloud_sync.py` | Every call to the cloud (see the parent's `docs/reference/cloud-contract.md`) |
 | `local_backend/roles.py`, `routers/deps.py` | Roles, permission checks, auth dependencies |
 | `local_backend/routers/ws.py` | Real-time event stream (seq + cursor replay) |