e0a119dabf (#114775) collapsed the account-status `connected` tri-state into a
boolean for running accounts: `resolveChannelAccountState` resolved
`input.runtime.connected ?? false` and the projection emitted the field
unconditionally. Every channel that never publishes connectivity (17 of 27
channel plugins, including imessage, signal, sms, googlechat, line, msteams)
therefore reported `connected: false` while running.
`evaluateChannelHealth` reads `connected === false` on a running account as
`disconnected`, so the gateway health monitor stopped and started every
socketless channel once per cooldown window, forever.
Restores absent connectivity as "no transport signal" in the one place it was
lost. Explicit `true`/`false` from socket channels is unchanged.
30fda068aa