v1.1.0

• Add synchronous methods track_sync(), identify_sync(), and group_sync() that return BatchResponse and raise SendError on failure

• Add queue_size() method to check pending events in queue

• Add on_error and on_success callback parameters to constructor for handling batch results

• Add logger parameter to constructor for custom logging configuration

• Support group-only events by allowing track() with group_id alone (without user_id) for organization-level tracking

• Export BatchResponse and SendError types from package

• Expand Python version support to 3.10, 3.11, 3.12, 3.13, and 3.14 (dropped 3.9)

• BREAKING: Remove ip parameter from track(), identify(), and group() methods