StorageService.prototype.getStream(path: string): Promise<ReadableStream<Uint8Array>>
Retrieves an object as a streaming body for zero-copy downloads.
Delegates to the provider's optional getStream; falls back to wrapping
the buffered get result in a one-chunk ReadableStream when the provider
lacks native streaming support.
Promise<ReadableStream<Uint8Array>>
A ReadableStream of object bytes