fix: handle APRS status DB ownership exits

lib/aprsme/is/is.ex

@@ -129,6 +129,7 @@ defmodule Aprsme.Is do
         # GenServer is not running (disconnected)
         server = Application.get_env(:aprsme, :aprs_is_server, nil)
         port = Application.get_env(:aprsme, :aprs_is_port, 14_580)
+        {stored_packet_count, oldest_packet_timestamp} = safe_packet_storage_stats()
 
         %{
           connected: false,
@@ -139,8 +140,8 @@ defmodule Aprsme.Is do
           login_id: Application.get_env(:aprsme, :aprs_is_login_id, "W5ISP"),
           filter: Application.get_env(:aprsme, :aprs_is_default_filter, "r/33/-96/100"),
           packet_stats: default_packet_stats(),
-          stored_packet_count: Aprsme.Packets.get_total_packet_count(),
-          oldest_packet_timestamp: Aprsme.Packets.get_oldest_packet_timestamp()
+          stored_packet_count: stored_packet_count,
+          oldest_packet_timestamp: oldest_packet_timestamp
         }
 
       _pid ->
@@ -151,6 +152,7 @@ defmodule Aprsme.Is do
             # GenServer exists but not responding
             server = Application.get_env(:aprsme, :aprs_is_server, ~c"rotate.aprs2.net")
             port = Application.get_env(:aprsme, :aprs_is_port, 14_580)
+            {stored_packet_count, oldest_packet_timestamp} = safe_packet_storage_stats()
 
             %{
               connected: false,
@@ -161,13 +163,23 @@ defmodule Aprsme.Is do
               login_id: Application.get_env(:aprsme, :aprs_is_login_id, "W5ISP"),
               filter: Application.get_env(:aprsme, :aprs_is_default_filter, "r/33/-96/100"),
               packet_stats: default_packet_stats(),
-              stored_packet_count: Aprsme.Packets.get_total_packet_count(),
-              oldest_packet_timestamp: Aprsme.Packets.get_oldest_packet_timestamp()
+              stored_packet_count: stored_packet_count,
+              oldest_packet_timestamp: oldest_packet_timestamp
             }
         end
     end
   end
 
+  defp safe_packet_storage_stats do
+    {Aprsme.Packets.get_total_packet_count(), Aprsme.Packets.get_oldest_packet_timestamp()}
+  rescue
+    DBConnection.OwnershipError ->
+      {0, nil}
+  catch
+    :exit, _ ->
+      {0, nil}
+  end
+
   def set_filter(filter_string), do: send_message("#filter #{filter_string}")
   def list_active_filters, do: send_message("#filter?")
 

test/aprsme/is_test.exs

@@ -7,6 +7,8 @@ defmodule Aprsme.IsTest do
 
   import ExUnit.CaptureLog
 
+  alias Ecto.Adapters.SQL.Sandbox
+
   # Helper to build a default GenServer state for direct callback testing
   defp build_state(overrides \\ %{}) do
     timer = Process.send_after(self(), :noop_timer, to_timeout(minute: 5))
@@ -519,6 +521,38 @@ defmodule Aprsme.IsTest do
       assert status.login_id == "TEST"
       assert status.filter == "r/33/-96/100"
     end
+
+    test "returns fallback packet storage stats when called from a non-owner process" do
+      parent = self()
+
+      owner =
+        spawn(fn ->
+          :ok = Sandbox.checkout(Aprsme.Repo)
+          send(parent, :sandbox_owner_ready)
+
+          receive do
+            :stop -> :ok
+          end
+        end)
+
+      assert_receive :sandbox_owner_ready
+
+      task =
+        Task.async(fn ->
+          receive do
+            :query_status -> Aprsme.Is.get_status()
+          end
+        end)
+
+      Sandbox.allow(Aprsme.Repo, owner, task.pid)
+      send(owner, :stop)
+      send(task.pid, :query_status)
+      status = Task.await(task)
+
+      assert status.connected == false
+      assert status.stored_packet_count == 0
+      assert status.oldest_packet_timestamp == nil
+    end
   end
 
   describe "buffer line extraction via TCP data" do