feat(api): tcp driver registry, identify, preset push delivery

- Track Wi-Fi TCP clients, liveness pings, disconnect broadcast, bind errors via gather\n- Device list/get include connected; POST identify with __identify preset\n- Presets push/send delivery helpers; bump led-driver hello type

Made-with: Cursor

tests/models/test_device.py

@@ -102,6 +102,7 @@ def test_upsert_wifi_tcp_client():
     assert i1 == m1
     d = devices.read(i1)
     assert d["name"] == "kitchen"
+    assert d["type"] == "led"
     assert d["transport"] == "wifi"
     assert d["address"] == "192.168.1.20"
 
@@ -115,6 +116,14 @@ def test_upsert_wifi_tcp_client():
     assert again == m1
     assert devices.read(m1)["address"] == "192.168.1.99"
 
+    assert (
+        devices.upsert_wifi_tcp_client(
+            "kitchen", "192.168.1.100", m1, device_type="bogus"
+        )
+        == m1
+    )
+    assert devices.read(m1)["type"] == "led"
+
     i3 = devices.upsert_wifi_tcp_client("hall", "10.0.0.5", "deadbeefcafe")
     assert i3 == "deadbeefcafe"
     assert len(devices.list()) == 3