Fix compilation warning in DeviceCache

- Group handle_info/2 clauses together
- This fixes the warning about clauses with same name/arity
- Now compiles cleanly with --warnings-as-errors

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

lib/aprsme/device_cache.ex

@@ -59,6 +59,18 @@ defmodule Aprsme.DeviceCache do
     {:ok, %{initial_load_done: false}}
   end
 
+  @impl true
+  def handle_call(:refresh_cache, _from, state) do
+    result = load_devices_into_cache()
+    {:reply, result, state}
+  end
+
+  @impl true
+  def handle_cast(:refresh_cache_async, state) do
+    load_devices_into_cache()
+    {:noreply, state}
+  end
+
   @impl true
   def handle_info(:initial_load, state) do
     # Load devices on startup
@@ -75,19 +87,6 @@ defmodule Aprsme.DeviceCache do
     end
   end
 
-  @impl true
-  def handle_call(:refresh_cache, _from, state) do
-    result = load_devices_into_cache()
-    {:reply, result, state}
-  end
-
-  @impl true
-  def handle_cast(:refresh_cache_async, state) do
-    load_devices_into_cache()
-    {:noreply, state}
-  end
-
-  @impl true
   def handle_info(:refresh_cache, state) do
     load_devices_into_cache()