source-zendesk-support-native: handle cursor paginated responses with…

… no results

When there are no results at all in a cursor paginated response, the
after and before cursor fields are not present. Although that shouldn't
affect the code flow (the `has_more` field would stop any attempted
pagination) a default value is needed to avoid validation errors.

source-zendesk-support-native/source_zendesk_support_native/models.py

@@ -208,8 +208,9 @@ class SlaPoliciesResponse(FullRefreshOffsetPaginatedResponse):
 class FullRefreshCursorPaginatedResponse(FullRefreshResponse):
     class Meta(BaseModel, extra="forbid"):
         has_more: bool
-        after_cursor: str | None
-        before_cursor: str | None
+        # after_cursor and before_cursor are not present in the response if there are no results.
+        after_cursor: str | None = None
+        before_cursor: str | None = None
 
     meta: Meta
     resources: list[FullRefreshResource]