* fix(discord): clear stale heartbeat timers in SafeGatewayPlugin.connect()
The @buape/carbon@0.15.0 heartbeat setup has a race where stopHeartbeat()
runs before heartbeatInterval is assigned, leaving a stale setInterval with
a closed reconnectCallback. When the stale interval fires ~41s later it
throws an uncaught exception that bypasses the EventEmitter error path and
crashes the gateway process via process.on('uncaughtException').
Add a connect() override in SafeGatewayPlugin that unconditionally clears
both heartbeatInterval and firstHeartbeatTimeout before calling super. The
parent's connect() only calls stopHeartbeat() when isConnecting=false; when
isConnecting=true it returns early without clearing — this override fills
that gap.
Fixes#65009. Related: #64011, #63387, #62038.
* test(discord): assert super.connect() delegation in SafeGatewayPlugin tests
* fix(ci): update raw-fetch allowlist line numbers for gateway-plugin.ts
The connect() override added in the heartbeat fix shifted the two
pre-existing fetch() callsites from lines 370/436 to 387/453.
* docs(changelog): add discord heartbeat crash note
* test(cli): align plugin registry load-context mock
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Co-authored-by: Vincent Koc <vincentkoc@ieee.org>
