feat: add endpoints desc

src/application/domain/exceptions/payment_metadata_exception.py

@@ -0,0 +1,12 @@
+from __future__ import annotations
+from typing import Mapping
+from src.application.domain.exceptions.application_exception import ApplicationException
+
+
+class PaymentMetadataException(ApplicationException):
+    def __init__(
+        self,
+        message: str = 'Payment metadata invalid',
+        headers: Mapping[str,str] | None = None,
+    ):
+        super().__init__(status_code=400,message=message,headers=headers)