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The AlertServer component needs to be refactored to improve separation of concerns and support graceful…

The AlertServer component needs to be refactored to improve separation of concerns and support graceful…: a task in LegoFlow-SWE (Harbor dataset). Observed behavior - Alert sending is embedded in AlertServer, mixing responsibilities. - There is no graceful shutdown mechanism; stopping the server…

The task

**Observed behavior** - Alert sending is embedded in AlertServer, mixing responsibilities. - There is no graceful shutdown mechanism; stopping the server may leave resources (e.g., the Netty remoting server) dangling. - The server port is not configurable.

Part of Lego-X/LegoFlow-SWE.