Class ConvertTransfer<TInput, TOutput>

Converter transfer: transforms input data via an Operator and sends the result to subscribers.

Capabilities: isInput, isOutput, isPushable, isSubscribable

Mechanics:

1. The constructor accepts config.operator: OperatorInterface<TInput, TOutput>
2. push(data: TInput) — applies operator.apply(data), notifies subscribers, clears _state
3. subscribe(handler) — subscribes to transformed data
4. destroy() — unsubscribes subscribers, clears _state
5. If the operator returns undefined, subscribers are not notified

Error handling:

• If operator.apply() throws an exception, onError is called.
• With onError provided, the exception is suppressed, subscribers are not notified.
• Without onError, the exception is rethrown.

Configuration (ConvertTransferConfig):

• operator: OperatorInterface<TInput, TOutput> — data transformer
• onError?: ErrorHandler — error handler

Difference from OperatorTransfer (old version):

• The new version's push() automatically notifies subscribers
• Has no trigger() — emission happens immediately on push()
• Has no pull() — the result is not stored after emission

Use cases:

• Type transformation in a stream (e.g., string → number)
• Filtering via GuardOperator (undefined blocks emission)
• Real-time data mapping
• Implementing TransformBridge