Nezha Monitoring: Unbounded WebSocket Streams — Resource Exhaustion DoS

Description The Nezha dashboard exposes two endpoints that create long-lived WebSocket streams to monitored agents: - POST /api/v1/terminal → createTerminal terminal.go:27-67 - POST /api/v1/file → createFM fm.go:28-67 Both call rpc.NezhaHandlerSingleton.CreateStreamstreamId, ... which inserts a...