forked from Mxmilu666/frp
* test/e2e: replace sleeps with event-driven waits in chaos/group/store tests Replace 21 time.Sleep calls with deterministic waiting using WaitForOutput, WaitForTCPReady, and a new WaitForTCPUnreachable helper. Add CountOutput method for snapshot-based incremental log matching. * test/e2e: validate interval and cap dial/sleep to remaining deadline in WaitForTCPUnreachable