feat: hook topology inference into polling pipeline

DevicePollerWorker calls Topology.process_device/2 after saving
neighbor data. Topology updates incrementally every poll cycle.

lib/towerops/workers/device_poller_worker.ex

@@ -328,6 +328,15 @@ defmodule Towerops.Workers.DevicePollerWorker do
         "device:#{device.id}",
         {:neighbors_updated, device.id}
       )
+
+    # Run topology inference after neighbor data is saved
+    case Towerops.Topology.process_device(device, device.organization_id) do
+      {:ok, :changed} ->
+        Logger.debug("Topology updated for #{device.name}")
+
+      {:ok, :unchanged} ->
+        :ok
+    end
   rescue
     error ->
       Logger.error("Error polling neighbors for #{device.name}: #{inspect(error)}\n#{Exception.format_stacktrace()}")