exit with Fatal if we cannot write to closed ws

[matthyx]

{"level":"error","ts":"2023-11-29T12:45:55Z","msg":"cannot send message","error":"use of closed network connection"}
{"level":"error","ts":"2023-11-29T12:46:45Z","msg":"cannot send message","error":"use of closed network connection"}
{"level":"error","ts":"2023-11-29T12:47:35Z","msg":"cannot send message","error":"use of closed network connection"}
{"level":"error","ts":"2023-11-29T12:48:25Z","msg":"cannot send message","error":"use of closed network connection"}
{"level":"error","ts":"2023-11-29T12:49:15Z","msg":"cannot send message","error":"use of closed network connection"}
{"level":"error","ts":"2023-11-29T12:50:05Z","msg":"cannot send message","error":"use of closed network connection"}
{"level":"error","ts":"2023-11-29T12:50:55Z","msg":"cannot send message","error":"use of closed network connection"}
{"level":"error","ts":"2023-11-29T12:51:45Z","msg":"cannot send message","error":"use of closed network connection"}
{"level":"error","ts":"2023-11-29T12:52:35Z","msg":"cannot send message","error":"use of closed network connection"}

[github-actions]

Summary:

• License scan: failure
• Credentials scan: success
• Vulnerabilities scan: success
• Unit test: success
• Go linting: success

[matthyx]

this is a workaround until I write a full connection handler like https://github.com/minio/minio/blob/0ee722f8c3b3d8b566c6d4b648d71b65bbf3a54b/internal/grid/connection.go

[github-actions]

Summary:

• License scan: failure
• Credentials scan: success
• Vulnerabilities scan: success
• Unit test: success
• Go linting: success

[dwertent]

@matthyx so should we merge this until you write the workaround?

[matthyx]

no, don't touch it - we need to behave differently between client and server