add feat upload pbg task

app/Models/PbgTaskAttachment.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class PbgTaskAttachment extends Model
+{
+    protected $fillable = ['pbg_task_id', 'file_name', 'file_path', 'pbg_type'];
+
+    public function task(){
+        return $this->belongsTo(PbgTask::class);
+    }
+}