feat: 实现消息提交防重配额授权与最小分发

internal/app/message/errors.go

@@ -0,0 +1,7 @@
+package message
+
+import "git.asio.asia/nixevol/NixMsg/internal/protocol"
+
+func errCode(code, msg string) *protocol.Error {
+	return &protocol.Error{Code: code, Message: msg}
+}