Replace sequential await in command/event dispatch with
asyncio.create_task() so slow commands (whois, httpcheck, tlscheck)
no longer block the read loop. Add _spawn() for task lifecycle
tracking. Enable cProfile in docker-compose for profiling. Add
scripts/test_client.py for end-to-end plugin testing.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
