Composes MqttConnection + MqttSubscriptionManager + LastValueCache into the
IDriver / ITagDiscovery / ISubscribable / IReadable / IHostConnectivityProbe /
IRediscoverable capability set.
- Discovery replays ONLY the authored raw tags (RediscoverPolicy = Once,
SupportsOnlineDiscovery = false) — a chatty broker can never auto-provision.
- Composition order is register -> AttachTo -> ConnectAsync; the manager's
Reconnected handler is passed through unwrapped so its throw-on-total-failure
still tears a deaf session down.
- ReinitializeAsync applies a tag-only delta in place and never faults on a bad
one; a session-changing delta rebuilds.
- ReadAsync serves the last-value cache and degrades per reference
(BadWaitingForInitialData), never throwing for the batch.
- FlushOptionalCachesAsync is a no-op: the last-value cache IS IReadable.
- Adds MqttDriverOptions.RawTags (the authored-tag delivery mechanism every
other driver's options DTO already has) and promotes MaxPayloadBytes from a
manager ctor knob to an operator-facing key.
- Converges on MqttDriverProbe.JsonOpts rather than a second, divergent
JsonSerializerOptions.
Claude-Session: https://claude.ai/code/session_01GASWkNEi68FSCtvr6rLoEW
Joseph Doherty