[WIP, AIT-324] Apply operations on ACK#118

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lawrence-forooghian wants to merge 10 commits intomainfrom

AIT-324-apply-on-ACK

Commits on Feb 27, 2026

Apply LiveObjects operations on ACK (RTO20)

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Implement RTO20e1: reject publishAndApply on bad channel state

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Pin Package.swift to ably-cocoa and ably-cocoa-plugin-support SHAs

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Add test-only extension on ARTProtocolMessage for extracting object

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Add echo/ACK interceptor infrastructure for apply-on-ACK tests

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Port apply-on-ACK integration tests from ably-js

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Remove unnecessary waitFor* calls after SDK write operations

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Update ably-cocoa pin to include its own Package.swift pin

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Fix verification issues found in apply-on-ACK tests

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Update ably-cocoa and plugin-support dependencies

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