Feature: Implementing graceful shutdown for DragonDB TCP server. #6
Description
The database server should support graceful shutdown behaviour to ensure client connections are not closed abruptly and in-flight requests are handled properly.
Features to be implemented:
- The server should stop accepting new requests after shutdown is initiated.
- All active requests should be processed fully before any connections are closed.
- Clients should be notified that the server is shutting down so they can stop sending further requests.
- Once all client connections are idle or completed, the server should shut down cleanly.