* ci: guard gateway protocol event coverage for iOS/Android clients (#100198)
Adds scripts/check-protocol-event-coverage.mjs, which derives the
server->client event catalog from GATEWAY_EVENTS in
src/gateway/server-methods-list.ts, extracts the events each mobile app
handles from Swift/Kotlin dispatch sites, and fails on gateway events no
client handles unless allowlisted with a reason in
scripts/protocol-event-coverage.allowlist.json. Wired as
pnpm check:protocol-coverage in the CI guards shard.
* fix(ci): scope Kotlin event extraction to handle*Event dispatch functions (#100198)
Bare event == "..." literals in predicate helpers outside the dispatch
path (gatewayEventInvalidatesNodesDevices in NodeRuntime.kt, which has no
production caller) counted as Android coverage, silently masking that
node.pair.requested/resolved have no live handler. Kotlin extraction now
only reads when(event) labels and event comparisons inside fun
handle*Event(...) bodies; node.pair.* moved to the Android allowlist with
a truthful reason. Swift extraction stays tree-wide because consumption
there always reads .event off a received EventFrame.
* fix(android): remove dead node pairing event helper
* fix(ci): preserve protocol allowlist parse errors
* test(ci): align tooling import plan
