Allow ipv4 and ipv6 to be None in NetworkInterface (#286)

The Supervisor API can return null for ipv4/ipv6 on interfaces that
have no configuration. Update fixture and test assertions to cover this.

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: agners

aiohasupervisor/models/network.py

@@ -137,8 +137,8 @@ class NetworkInterface(ResponseData):
     connected: bool
     primary: bool
     mac: str
-    ipv4: IPv4
-    ipv6: IPv6
+    ipv4: IPv4 | None
+    ipv6: IPv6 | None
     wifi: Wifi | None
     vlan: Vlan | None
     mdns: MulticastDnsMode | None

tests/fixtures/network_info.json

@@ -39,24 +39,8 @@
         "connected": false,
         "primary": false,
         "mac": "00:11:22:33:44:55",
-        "ipv4": {
-          "method": "disabled",
-          "address": [],
-          "nameservers": [],
-          "gateway": null,
-          "ready": false,
-          "route_metric": null
-        },
-        "ipv6": {
-          "method": "disabled",
-          "address": [],
-          "nameservers": [],
-          "gateway": null,
-          "ready": false,
-          "route_metric": null,
-          "addr_gen_mode": "default",
-          "ip6_privacy": "default"
-        },
+        "ipv4": null,
+        "ipv6": null,
         "wifi": null,
         "vlan": null,
         "mdns": null,

tests/test_network.py

@@ -59,6 +59,8 @@ async def test_network_info(
     assert result.interfaces[1].interface == "end0.10"
     assert result.interfaces[1].type == "vlan"
     assert result.interfaces[1].enabled is False
+    assert result.interfaces[1].ipv4 is None
+    assert result.interfaces[1].ipv6 is None
     assert result.interfaces[1].mdns is None
     assert result.interfaces[1].llmnr is None