feat: associate generation calls with devices

apps/billing/models.py

@@ -35,6 +35,14 @@ class CallRecord(models.Model):
         on_delete=models.SET_NULL,
         related_name="call_records",
     )
+    client_device = models.ForeignKey(
+        "licensing.ClientDevice",
+        verbose_name="客户端设备",
+        null=True,
+        blank=True,
+        on_delete=models.SET_NULL,
+        related_name="call_records",
+    )
     operation_type = models.CharField("操作类型", max_length=32, choices=OperationType.choices)
     alias = models.CharField("能力别名", max_length=64, blank=True)
     model_used = models.CharField("实际模型", max_length=128, blank=True)
@@ -68,6 +76,7 @@ class CallRecord(models.Model):
         indexes = [
             models.Index(fields=("user", "created_at")),
             models.Index(fields=("api_key", "created_at")),
+            models.Index(fields=("client_device", "created_at")),
             models.Index(fields=("operation_type", "status")),
             models.Index(fields=("alias",)),
         ]