fix: prevent cascading crash in error email handler when SES not configured

lib/towerops/honeybadger_notice_filter.ex

@@ -49,12 +49,18 @@ defmodule Towerops.HoneybadgerNoticeFilter do
       |> subject(subject)
       |> text_body(body)
 
-    case Mailer.deliver(email) do
-      {:ok, _} ->
-        :ok
+    try do
+      case Mailer.deliver(email) do
+        {:ok, _} ->
+          :ok
 
-      {:error, reason} ->
-        Logger.error("Failed to send Honeybadger error email: #{inspect(reason)}")
+        {:error, reason} ->
+          Logger.warning("Failed to send error email: #{inspect(reason)}")
+          :error
+      end
+    rescue
+      e ->
+        Logger.warning("Error email delivery crashed: #{Exception.message(e)}")
         :error
     end
   end