test(ios): script the authenticated host status in pairing tests

[teamleaderleo]

Since #7908 and #8299 (@azooz2003-bit), pairing sends workspace.list and then an authenticated mobile.host.status that binds the route to the Mac before anything is persisted. Twenty cmuxFeatureTests still scripted only the workspace list. Their scripted transports spent the list frame on the status request, or their routers replied "Unexpected method". Every pairing ended in connectionClosed, and the assertions ran against the preview workspaces.

remoteCreateTerminalDoesNotStealSelectionAfterWorkspaceSwitch never reached terminal.create, so waitForTerminalCreateRequest() parked forever. That hung the whole simulator suite until the job was killed 14 minutes later (exit 143), which also hid every package test bundle that runs after cmuxFeatureTests.

Changes:

• Scripted tests add rpcHostStatusFrame after the workspace list, as the passing neighbours already do (for example uuidAttachTicketListsAllWorkspacesFirstWithAttachToken). Each frame reports the ticket's own Mac, because pairing rejects a mismatched identity.
• Request-aware routers answer mobile.host.status. The superseded-URL router reports whichever Mac's list it just served.
• The version-warning test checks that the warning sends no new requests, instead of pinning the total request count.

Part of getting the full iOS simulator suite (test-ios.yml, ios-simulator (iphone)) green on main. It failed the same way on Blacksmith (run 36114121829) and the owned mini cmux10s (run 36114119494). These tests were hidden while the iOS test target did not compile (fixed in #14421), and PR CI runs only selected tests.

Verified in the combined full-suite run 36119701161 (all fix branches stacked): every test this PR touches passes.

🤖 Generated with Claude Code

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Summary by cubic

Fixes the scripted pairings in cmuxFeatureTests so they respond to the authenticated mobile.host.status request that pairing now sends after workspace.list (since #7908 and #8299). The tests previously scripted only the workspace list, so every pairing ended in connectionClosed and one test never reached terminal.create, hanging the simulator suite until the job was killed.

• Scripted tests add rpcHostStatusFrame after the workspace list, and the request-aware routers answer mobile.host.status as well.
• The version-warning test now checks that the warning sends no new requests instead of pinning the total request count.

^{Written for commit f9dea5d. Summary will update on new commits.}

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Reviewing files that changed from the base of the PR and between 446c2c4 and f9dea5d.

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• ios/cmuxPackage/Tests/cmuxFeatureTests/cmuxFeatureTests.swift

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Merge receipt for f9dea5d291: every check was green at merge (7 verified; 12 skipped by policy). Full suite runs on main after merge.