Class ReadTransfer<T>

Read adapter for an arbitrary OutputFlowInterface (e.g., Storage).

Capabilities: isOutput, isPullable

Mechanics:

1. The constructor accepts config.flow: OutputFlowInterface
2. pull() — returns 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, pull() returns undefined.
• Without onError, the exception is rethrown.

Configuration (ReadTransferConfig):

• flow: OutputFlowInterface — target flow with a read() method
• onError?: ErrorHandler — error handler

Use cases:

• Reading data from Storage (LatestStorage, QueueStorage, StackStorage)
• Adapting an arbitrary object with read() to pipeline
• Data source for polling transfers