WPB-28162: version-aware event delivery - #5469
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Add a Transmit type class and a dispatcher over stored untyped event objects, applied on both delivery channels using the API version of the endpoint the client called. Meeting-related events (conversation.create-meeting, conversation.delete-meeting, meeting.*) are not delivered to clients below V15, the version meetings were introduced in. - wire-api: Transmit class (Wire.API.Notification), family instances (Wire.API.Event.Conversation, Wire.API.Event.Meeting), and dispatcher Wire.API.Event.Transmit (unknown types always delivered, gated types fail closed on decode errors, >= V15 fast path returns stored bytes) - gundeck: APIVersion prefix on all four notification routes; paginate filters survivors with a bounded refill loop so an all-gated page cannot strand the client cursor; fetchId/fetchLast post-filter - cannon: APIVersion prefix on all four websocket routes; per-connection wsApiVersion; legacy push and RMQ paths encode per-target version; filtered drops are acked/reported OK so gundeck does not fall back to native push - tests: unit Test.Wire.API.Event.Transmit incl. encoding drift guards; integration Test.NotificationsVersioned (REST + websocket); Testlib.Cannon can open websockets at an explicit API version Storage, fan-out and native push are unchanged; modern clients receive byte-identical payloads.
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https://wearezeta.atlassian.net/browse/WPB-28162
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changelog.d