StellarisW
f57157a128
Replace REST-based Discord liveness probe with local WebSocket/heartbeat state detection. REST success doesn't prove Gateway event delivery — a half-closed WebSocket can leave Bot.start() alive while REST returns 200. Now samples ready/open/ACK state and heartbeat latency; consecutive unhealthy samples emit one retryable fatal code so GatewayRunner rebuilds the adapter through the existing reconnect path. Also fixes three lifecycle gaps in the recovery path: 1. asyncio.wait_for() can remain blocked if adapter cleanup swallows cancellation — now uses bounded asyncio.wait() with task detachment. 2. Multiplexed secondary-profile adapters had no profile-scoped reconnect owner — now uses one runner-owned reconnect slot per profile. 3. An in-flight turn could send its final text through the disconnected adapter after a replacement was registered — now resolves the live same-profile replacement for unsent final responses only (message IDs never migrate, edits/deletes stay on the old transport). Adds an opt-in Linux/systemd event-loop watchdog (gateway.systemd_watchdog_seconds, default 0) for the failure mode where the whole asyncio loop stops making progress and no in-process liveness task can run. stdlib-only sd_notify, Type=notify/WatchdogSec generation, READY/STOPPING lifecycle. Co-authored-by: 王鑫 <wx.xw@bytedance.com>
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