Runtime: stabilize tool/run state transitions under compaction and backpressure

Synthesize runtime state transition fixes for compaction tool-use integrity and long-running handler backpressure.

Sources: #33630, #33583

Co-authored-by: Kevin Shenghui <shenghuikevin@gmail.com>
Co-authored-by: Theo Tarr <theodore@tarr.com>

src/discord/monitor/provider.ts

@@ -395,6 +395,7 @@ export async function monitorDiscordProvider(opts: MonitorDiscordOpts = {}) {
   }
   let lifecycleStarted = false;
   let releaseEarlyGatewayErrorGuard = () => {};
+  let deactivateMessageHandler: (() => void) | undefined;
   let autoPresenceController: ReturnType<typeof createDiscordAutoPresenceController> | null = null;
   try {
     const commands: BaseCommand[] = commandSpecs.map((spec) =>
@@ -596,6 +597,8 @@ export async function monitorDiscordProvider(opts: MonitorDiscordOpts = {}) {
       accountId: account.accountId,
       token,
       runtime,
+      setStatus: opts.setStatus,
+      abortSignal: opts.abortSignal,
       botUserId,
       guildHistories,
       historyLimit,
@@ -610,6 +613,7 @@ export async function monitorDiscordProvider(opts: MonitorDiscordOpts = {}) {
       threadBindings,
       discordRestFetch,
     });
+    deactivateMessageHandler = messageHandler.deactivate;
     const trackInboundEvent = opts.setStatus
       ? () => {
           const at = Date.now();
@@ -679,6 +683,7 @@ export async function monitorDiscordProvider(opts: MonitorDiscordOpts = {}) {
       releaseEarlyGatewayErrorGuard,
     });
   } finally {
+    deactivateMessageHandler?.();
     autoPresenceController?.stop();
     opts.setStatus?.({ connected: false });
     releaseEarlyGatewayErrorGuard();