Joseph Doherty b6c373c5e4 feat(mqtt): add MqttBinaryDecoder with CONNECT/PUBLISH/SUBSCRIBE parsing and 27 tests ...

Port binary MQTT 3.1.1 packet body decoding from Go mqtt.go (~lines 700–1500, 2200).
MqttBinaryDecoder parses CONNECT (protocol name, connect flags, keepalive, client ID,
will topic/message, username, password), PUBLISH (topic, packet ID for QoS>0, DUP/
RETAIN flags, application payload), and SUBSCRIBE (packet ID, topic-filter + QoS list).
Adds TranslateFilterToNatsSubject for simple MQTT wildcard conversion (+ → *, # → >,
/ → .). All 27 tests in MqttBinaryParserTests pass.

2026-02-24 14:58:48 -05:00

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