Class StreamRecorder

Settle a stream that reached its terminal finish chunk.

A terminal finish can still be a FAILURE — an adapter that decoded an in-band provider error emits finish with an error reason — and that settles as request/failure, not as a response. The alternative would be a request/response row whose finish reason says the call failed, which two different queries would then disagree about.

Settle a stream that ended without a terminal finish — a transport drop, a cancellation, a decode that threw.

Fold one chunk. The grammar runs inside the assembler; violations throw.