feat: add GeneratesUniqueSlug class for unique slug generation

feat: create PostCategoryFactory for generating post category data

feat: create PostFactory for generating post data

feat: add retry_requested_at column to services table

feat: add vcenter provisioning fields to products table

feat: add module_host_id to os table

feat: create email_notification_templates table for email templates

feat: add scenario and format fields to template table

feat: add admin fields to transactions table

fix: update ticket table columns and types

feat: add uuid to ticket table and backfill existing records

fix: make ticket_reply user_id nullable

feat: create notifications table for user notifications

fix: make ticket uuid nullable

feat: create post_categories table for blog categories

feat: create posts table for blog posts

feat: add invoice email template for PDF generation

app/Models/Template.php

@@ -13,12 +13,31 @@ class Template extends Model
 
     protected $fillable = [
         'type_id',
+        'scenario',
+        'format',
+        'invoice_template_id',
         'name',
         'subject',
         'message',
-        'status'
+        'status',
     ];
 
+    protected $casts = [
+        'status' => 'integer',
+    ];
+
+    public const SCENARIOS = [
+        'vm_credentials'   => 'Khởi tạo dịch vụ',
+        'renewal_reminder' => 'Nhắc gia hạn',
+        'news_notification'=> 'Thông báo tin tức',
+        'invoice_pdf'      => 'Hoá đơn điện tử',
+    ];
+
+    public function invoiceTemplate()
+    {
+        return $this->belongsTo(self::class, 'invoice_template_id');
+    }
+
     public function type()
     {
         return $this->belongsTo(\App\Models\Type::class);