[增添]添加了MetricResource的数据库以及页面元素

management-panel/app/Models/Metric.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class Metric extends Model
+{
+    use HasFactory;
+    protected $fillable=[
+        "name",
+        "namespace_index",
+        "identifier_type",
+        "numeric_id",
+        "string_id",
+        "guid_id",
+        "help"
+    ];
+
+    const TYPE_NUMERIC = 1;
+    const TYPE_STRING = 2;
+    const TYPE_GUID = 3;
+}