Add audit logs for rules.

app/Models/AuditLogEntry.php

@@ -0,0 +1,58 @@
+<?php
+/*
+ * AuditLogEntry.php
+ * Copyright (c) 2022 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+namespace FireflyIII\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\MorphTo;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+/**
+ * Class AuditLogEntry
+ */
+class AuditLogEntry extends Model
+{
+    use SoftDeletes;
+
+    protected $casts = [
+        'before' => 'array',
+        'after' => 'array',
+        'created_at' => 'datetime',
+        'updated_at' => 'datetime',
+        'deleted_at' => 'datetime',
+    ];
+
+    /**
+     * @codeCoverageIgnore
+     */
+    public function auditable(): MorphTo
+    {
+        return $this->morphTo();
+    }
+
+    /**
+     * @codeCoverageIgnore
+     */
+    public function changer(): MorphTo
+    {
+        return $this->morphTo();
+    }
+}