feat: Reimplement order and invoice management with new service and repository layers, introduce compression middleware, and update database schema.

app/Models/Service.php

@@ -0,0 +1,89 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+class Service extends Model
+{
+    use HasFactory, SoftDeletes;
+
+    protected $table = 'services';
+
+    protected $guarded = [];
+
+    protected $casts = [
+        'auto_renew'   => 'boolean',
+        'started_at'   => 'datetime',
+        'expires_at'   => 'datetime',
+        'suspended_at' => 'datetime',
+        'cancelled_at' => 'datetime',
+    ];
+
+    // -------------------------------------------------------------------------
+    // Relationships
+    // -------------------------------------------------------------------------
+
+    public function customer()
+    {
+        return $this->belongsTo(Customer::class);
+    }
+
+    public function product()
+    {
+        return $this->belongsTo(Product::class, 'product_id');
+    }
+
+    /** The order item that triggered provisioning. */
+    public function orderItem()
+    {
+        return $this->belongsTo(OrderItem::class, 'order_item_id');
+    }
+
+    /** The most recent invoice covering this service (updated on renewal). */
+    public function invoice()
+    {
+        return $this->belongsTo(Invoice::class, 'invoice_id');
+    }
+
+    /** Configurable resources / features attached to this service. */
+    public function addons()
+    {
+        return $this->hasMany(ServiceAddon::class, 'service_id');
+    }
+
+    // -------------------------------------------------------------------------
+    // Helpers
+    // -------------------------------------------------------------------------
+
+    public function isActive(): bool
+    {
+        return $this->status === 'active';
+    }
+
+    public function isExpired(): bool
+    {
+        return $this->expires_at !== null && $this->expires_at->isPast();
+    }
+
+    public function getStatusLabelAttribute(): string
+    {
+        return match ($this->status) {
+            'pending'    => 'Chờ kích hoạt',
+            'active'     => 'Đang hoạt động',
+            'suspended'  => 'Tạm ngưng',
+            'expired'    => 'Hết hạn',
+            'cancelled'  => 'Đã hủy',
+            'terminated' => 'Đã xóa',
+            default      => ucfirst($this->status),
+        };
+    }
+
+    /** Convenience: get an addon value by type. */
+    public function getAddon(string $type): ?string
+    {
+        return $this->addons->firstWhere('addon_type', $type)?->addon_value;
+    }
+}