Is it possible to limit the rate of a stream?

I'm using `quiche` to run a QUIC/H3 server. Sometimes we wanted to rate limit (say, at most 2Mbps) a stream (Http POST) from a client, is it possible with quiche?

Start by reviewing quiche's QUIC/H3 stream handling and the HTTP POST path to determine whether per-stream rate limiting is exposed. Done means an explicit answer about configuring a 2 Mbps cap, with any required API scope or limitation documented.

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