Cisco ASA table add alert defaults (#15488)

Fixes issue when values weren't set
Can't set an upper limit since models are different
Also, no way to set this in the webui and the default alert rule doesn't use the values, so yeah, probably could have deleted the fields.

database/migrations/2023_10_20_075853_cisco_asa_add_default_limits.php

@@ -0,0 +1,30 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('ciscoASA', function (Blueprint $table) {
+            $table->bigInteger('high_alert')->default(-1)->change();
+            $table->bigInteger('low_alert')->default(0)->change();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('ciscoASA', function (Blueprint $table) {
+            $table->bigInteger('high_alert')->change();
+            $table->bigInteger('low_alert')->change();
+        });
+    }
+};