Release v0.11.0

Added

• Core: support OAuth client credentials authentication via client_id and client_secret in XurrentApiHelper while maintaining API key compatibility.
• Core: The OAuth token endpoint now dynamically determines the domain from base_url, preserving any regional subdomains to ensure consistency between API and OAuth endpoints.
• Core: When using OAuth, if a 401 Unauthorized error is received, the token is automatically refreshed and the API call is retried once. If authentication still fails after token refresh, an explicit HTTPError is raised.