RESTClient: JSONResponseCursorPaginator does not support field names with dots in cursor_body_path

[burnash]

Description

In the JSONResponseCursorPaginator class, the cursor_body_path parameter allows users to specify a path to insert a cursor value into the request body JSON. However, it currently mishandles field names that contain dots (e.g., "user.name"). The implementation splits the cursor_body_path string by dots in the _set_value_at_path method, treating it as a nested path (e.g., {"user": {"name": value}}). This is incorrect when the API expects a single key with a dot in its name (e.g., {"user.name": value}).

Suggested Fix

Update JSONResponseCursorPaginator to treat cursor_body_path as a JSONPath rather than a dot-separated string. Parse the path using the jsonpath_ng library to extract path components:

• For a nested path like "user.name", interpret it as ["user", "name"].
• For a single key with a dot like "['user.name']", interpret it as ["user.name"].