When a speaker finishes with an end symbol, the turn was only advanced
in the message_sent hook. But by that time, the message had already been
broadcast to other agents, whose before_model_resolve ran with the old
turn state, causing them to be blocked by the turn gate (forced no-reply).
Fix: Move turn advance for both NO_REPLY and end-symbol cases to
before_message_write, which fires before the message is broadcast.
Use sessionTurnHandled set to prevent double-advancing in message_sent.
zhi
6d17e6a911