Add application metrics model and relationships (#15417)

* Add application metrics model and relationships

* update schema check file

* Add missed index

* Update testing definition

* sqlite can't create the id later

* update schema dumps

* update testing_persistent schema

* update baseline

app/Models/Application.php

@@ -49,4 +49,11 @@ class Application extends DeviceRelatedModel
     {
         return $this->displayName();
     }
+
+    // ---- Define Relationships ----
+
+    public function metrics()
+    {
+        return $this->hasMany(ApplicationMetric::class, 'app_id', 'app_id');
+    }
 }

app/Models/ApplicationMetric.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class ApplicationMetric extends Model
+{
+    use HasFactory;
+
+    public $timestamps = false;
+
+    // ---- Define Relationships ----
+
+    public function app()
+    {
+        return $this->belongsTo(Application::class, 'app_id');
+    }
+}