BLEManager

Main BLE manager for Electric Unicycles.

This class is responsible for BLE scanning, connection lifecycle management, protocol selection, command transmission, and decoded data delivery.

Threading model:

• Internal asynchronous work is executed on a background coroutine scope based on Dispatchers.IO + SupervisorJob().

• Public callbacks exposed by this manager (ConnectionCallback, DataCallback, and ErrorCallback) are not guaranteed to be invoked on the Android main thread.

• Callers must explicitly switch to Dispatchers.Main, runOnUiThread, or an equivalent UI mechanism before touching Android views.

Rationale:

• BLE operations, retries, polling, and response timeouts are background work and should not run on the main thread.

• Keeping callback dispatching explicit avoids hiding threading behavior from the library consumer and keeps the manager usable from non-UI contexts as well.