Wraps the CyberSource imports in a warnings filter, so we get less chatter from SyntaxWarning issues (#191)

The CyberSource Python REST client library uses a couple of regexes that aren't in raw strings, and (starting with Python 3.12) doing that raises a SyntaxWarning. (This was deprecated in 3.6 but in between then and 3.12 it raised a DeprecationWarning, which is usually invisible.) Wrapping these in a `catch_warnings` context manager lets us filter out SyntaxWarning, so we can make it quiet. (pytest also sometimes regards these as _errors_, which keeps your tests from passing when using Python 3.12+, so this should fix that too.) It would be better for the upstream to be fixed but we can do this until that happens.

Author: jkachel

src/payment_gateway/changelog.d/20250227_142343_jkachel_wrap_cybersource_imports.md

@@ -0,0 +1,40 @@
+<!--
+A new scriv changelog fragment.
+
+Uncomment the section that is right (remove the HTML comment wrapper).
+-->
+
+<!--
+### Removed
+
+- A bullet item for the Removed category.
+
+-->
+<!--
+### Added
+
+- A bullet item for the Added category.
+
+-->
+### Changed
+
+- Wrap the imports for CyberSource; they generate `SyntaxWarning`s, so this should quiet them down (and allow them to pass tests)
+
+<!--
+### Deprecated
+
+- A bullet item for the Deprecated category.
+
+-->
+<!--
+### Fixed
+
+- A bullet item for the Fixed category.
+
+-->
+<!--
+### Security
+
+- A bullet item for the Security category.
+
+-->

src/payment_gateway/mitol/payment_gateway/api.py

@@ -7,21 +7,24 @@
 import hmac
 import json
 import uuid
+import warnings
 from base64 import b64encode
 from dataclasses import dataclass
 from decimal import Decimal
 from functools import wraps
 
-from CyberSource import (
-    CreateSearchRequest,
-    Ptsv2paymentsClientReferenceInformation,
-    Ptsv2paymentsidcapturesOrderInformationAmountDetails,
-    Ptsv2paymentsidrefundsOrderInformation,
-    RefundApi,
-    RefundPaymentRequest,
-    SearchTransactionsApi,
-    TransactionDetailsApi,
-)
+with warnings.catch_warnings():
+    warnings.filterwarnings("ignore", category=SyntaxWarning)
+    from CyberSource import (
+        CreateSearchRequest,
+        Ptsv2paymentsClientReferenceInformation,
+        Ptsv2paymentsidcapturesOrderInformationAmountDetails,
+        Ptsv2paymentsidrefundsOrderInformation,
+        RefundApi,
+        RefundPaymentRequest,
+        SearchTransactionsApi,
+        TransactionDetailsApi,
+    )
 from django.conf import settings
 
 from mitol.common.utils.datetime import now_in_utc