feat(orders): add recipient management and enhance order forms

- Introduced Recipient model to manage order recipients separately from customers.
- Updated Order model to link to Recipient, replacing recipient_name and recipient_phone fields.
- Enhanced OrderForm to include recipient selection modes: customer, history, and new.
- Added AJAX endpoint to fetch recipient history for customers.
- Updated admin interface to manage recipients and display recipient information in order details.
- Refactored address handling to accommodate new recipient logic.
- Improved demo order creation to include random recipients.

myproject/orders/models/recipient.py

@@ -0,0 +1,41 @@
+from django.db import models
+
+
+class Recipient(models.Model):
+    """
+    Модель получателя заказа.
+    Один получатель может получать доставки по разным адресам.
+    """
+    name = models.CharField(
+        max_length=200,
+        verbose_name="Имя получателя",
+        help_text="ФИО или название организации получателя"
+    )
+
+    phone = models.CharField(
+        max_length=20,
+        verbose_name="Телефон получателя",
+        help_text="Контактный телефон для связи с получателем"
+    )
+
+    # Временные метки
+    created_at = models.DateTimeField(auto_now_add=True, verbose_name="Дата создания")
+    updated_at = models.DateTimeField(auto_now=True, verbose_name="Дата обновления")
+
+    class Meta:
+        verbose_name = "Получатель"
+        verbose_name_plural = "Получатели"
+        indexes = [
+            models.Index(fields=['phone']),
+            models.Index(fields=['name']),
+            models.Index(fields=['created_at']),
+        ]
+        ordering = ['-created_at']
+
+    def __str__(self):
+        return f"{self.name} ({self.phone})"
+
+    @property
+    def display_name(self):
+        """Форматированное имя для отображения"""
+        return f"{self.name} - {self.phone}"