[PM-39294] Gate shared unlock handshakes on transport reachability - #1221

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coroiu/pm-39294-ipc-reachability

Commits on Jun 29, 2026

build: keep builds resolving (crypto-bigint patch, rsa rc.18)

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feat(ipc): add transport reachability query to CommunicationBackend

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feat(ipc): reachability tracker with ping/pong fallback

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feat(ipc): wire control-plane splitter and client-owned tracker

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feat(shared-unlock): gate follower sends on leader reachability

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feat(ipc/wasm): expose reachability tracker and handle to JS

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test(ipc): wasm reachability integration tests

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refactor(ipc): address review feedback

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fix(ipc): stop the reachability control handler on cancellation

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fix(ipc): satisfy private_interfaces and rustdoc lints

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refactor(ipc): drop web-time for clock-free reachability liveness

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refactor(ipc): decouple control plane from reachability tracker

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refactor(ipc): make the ping loop owned by the handle's inner

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refactor(ipc): rename Unknown to Unsupported and stop the loop for supported transports

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