v0.9.3

Cleanup device manager, providers and events (#74)

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## Summary

* **New Features**
* Centralized device management with queued detection and per-device
lifecycle handling.
* Factory-provided event emitters integrated across device providers for
richer lifecycle and logging.

* **Bug Fixes**
* More reliable connect/disconnect and refresh flows; in-flight
transport requests are rejected on close to avoid hangs.
  * Reduced stale device state and missed disconnects.

* **Chores**
* Stricter TypeScript/typecheck and linting; clarified method and API
typings.
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