Method flush

cli/src/claude/utils/OutgoingMessageQueue.ts:147–163

* Flush all messages immediately (for cleanup)

()

     * Flush all messages immediately (for cleanup)
     */
    async flush(): Promise<void> {
        await this.lock.inLock(async () => {
            // Clear all delay timers
            for (const timer of this.delayTimers.values()) {
                clearTimeout(timer);
            }
            this.delayTimers.clear();
            
            // Mark all as released
            for (const item of this.queue) {
                item.released = true;
            }
            
            // Process everything - use internal method since we already have the lock
            this.processQueueInternal();
        });
    }
    
    /**
     * Schedule processing on next tick