Added Model file

app/Models/LeakTestReading.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+class LeakTestReading extends Model
+{
+    use SoftDeletes;
+
+    protected $fillable = [
+        'plant_id',
+        'item_code',
+        'serial_number',
+        'test_status',
+        'created_at',
+        'updated_at',
+    ];
+
+    public function plant()
+    {
+        return $this->belongsTo(Plant::class);
+    }
+}