Investigate and fix repeated error on Windows

[mostafa]

When running the plugin on Windows, and trying to run a test, everything works well, except when the psql/usql is disconnected. At which time, GatewayD starts printing an error message infinitely:

2023-12-04T12:50:50+01:00 ERR Cannot receive startup message error=EOF plugin=gatewayd-plugin-cache.exe timestamp=2023-12-04T12:50:50.692+0100
2023-12-04T12:50:50+01:00 ERR Cannot receive startup message error=EOF plugin=gatewayd-plugin-cache.exe timestamp=2023-12-04T12:50:50.694+0100
...