Add compatibility fixes and queued state tests

[pgularski]

Summary

• Replace Travis badges and CI config with GitHub Actions references
• Add compatibility fallbacks for logging, defaultdict, and unbounded deque behavior
• Fail clearly when dispatching before initialization in core, queued, and async machines
• Strengthen async and queued initialization behavior with new regression tests
• Bump the package version and add Python 3.13 support metadata

Testing

• Added unit tests covering initialization guards, async locking, nested queued dispatch, and compatibility fallbacks
• Added a smoke test for the upstream import path
• Not run (not requested)