Log unexpected messages from trapping servers

The `reporter` and `cronitor` have a small set of messages they expect.
Rather than crashing on unexpected messages, the processes now log a
warning instead.

lib/oban/met/cronitor.ex

@@ -6,6 +6,8 @@ defmodule Oban.Met.Cronitor do
   alias __MODULE__, as: State
   alias Oban.Notifier
 
+  require Logger
+
   defstruct [
     :conf,
     :name,
@@ -112,6 +114,16 @@ defmodule Oban.Met.Cronitor do
     {:noreply, %State{state | crontabs: crontabs}}
   end
 
+  def handle_info(message, state) do
+    Logger.warning(
+      message: "Received unexpected message: #{inspect(message)}",
+      source: :oban_met,
+      module: __MODULE__
+    )
+
+    {:noreply, state}
+  end
+
   # Helpers
 
   defp purge_stale(state) do

lib/oban/met/reporter.ex

@@ -17,6 +17,8 @@ defmodule Oban.Met.Reporter do
   alias Oban.Met.Values.Gauge
   alias Oban.Pro.Engines.Smart
 
+  require Logger
+
   @empty_states %{
     "available" => [],
     "cancelled" => [],
@@ -116,6 +118,16 @@ defmodule Oban.Met.Reporter do
     end
   end
 
+  def handle_info(message, state) do
+    Logger.warning(
+      message: "Received unexpected message: #{inspect(message)}",
+      source: :oban_met,
+      module: __MODULE__
+    )
+
+    {:noreply, state}
+  end
+
   # Scheduling
 
   defp schedule_checks(state) do