feat: 프로젝트 기본 구조 구축

strategies/models.py

@@ -73,6 +73,10 @@ class StrategyExecution(models.Model):
     completed_at = models.DateTimeField(null=True, blank=True)
     result = models.JSONField(null=True, blank=True)
     error_message = models.TextField(blank=True)
+    callback_url = models.URLField(max_length=500, blank=True, null=True, help_text="전략 실행 완료 후 결과를 전송할 콜백 URL")
+    callback_sent = models.BooleanField(default=False, help_text="콜백 전송 완료 여부")
+    callback_sent_at = models.DateTimeField(null=True, blank=True, help_text="콜백 전송 일시")
+    callback_response = models.JSONField(null=True, blank=True, help_text="콜백 응답 데이터")
 
     def __str__(self):
         return f"Execution of {self.strategy_version} - {self.status}"