Class AsyncReadTransfer<T>

Asynchronous read adapter for AsyncOutputFlowInterface.

Capabilities: isOutput, isAsyncPullable

Mechanics:

1. The constructor accepts config.flow: AsyncOutputFlowInterface
2. asyncPull() — returns await flow.read()
3. destroy() — does nothing (does not own the flow)

Error handling:

• If flow.read() throws an exception, onError is called.
• With onError provided, the exception is suppressed, asyncPull() returns undefined.
• Without onError, the exception is rethrown.

Configuration (AsyncReadTransferConfig):

• flow: AsyncOutputFlowInterface — target flow with async read()
• onError?: ErrorHandler — error handler

Use cases:

• Reading data from async storage (IndexedDB, API)
• Data source for async-polling transfers