Fix SendMsgError

✅ Solution

SendMsgError usually arises when the sendmsg syscall fails due to network issues like connection timeouts or network unavailability. Implement comprehensive error handling by mapping specific errno values (e.g., ETIMEDOUT, ECONNREFUSED) to more descriptive Zig error enums like `error.ConnectionTimedOut`, `error.ConnectionRefused`, and retry the operation if the error is transient. Also, consider adding a configurable timeout for sendmsg to prevent indefinite blocking.