0.6.0

pmq.stream.PriceStream: standard-library client for the resolution price feed (ws-live-data.polymarket.com): the Chainlink stream that resolves the updown markets plus the Binance spot mirror. Short-poll design measured in production (the edge serves the sustained push only to browser connections; the initial batch is fresh to 1.2-2.8s and is re-polled about once per second), incremental RFC 6455 decoder, per-symbol dedup and rings, last()/age()/recent()/health(), optional on_tick callback. No new dependencies.