Feat：Using Go to implement user registration logic (#13431)

### What problem does this PR solve?

Feat：Using Go to implement user registration logic

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

internal/common/error_code.go

@@ -0,0 +1,40 @@
+//
+//  Copyright 2026 The InfiniFlow Authors. All Rights Reserved.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License");
+//  you may not use this file except in compliance with the License.
+//  You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS,
+//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//  See the License for the specific language governing permissions and
+//  limitations under the License.
+//
+
+package common
+
+type ErrorCode int
+
+const (
+	CodeSuccess             ErrorCode = 0
+	CodeNotEffective        ErrorCode = 10
+	CodeExceptionError      ErrorCode = 100
+	CodeArgumentError       ErrorCode = 101
+	CodeDataError           ErrorCode = 102
+	CodeOperatingError      ErrorCode = 103
+	CodeTimeoutError        ErrorCode = 104
+	CodeConnectionError     ErrorCode = 105
+	CodeRunning             ErrorCode = 106
+	CodeResourceExhausted   ErrorCode = 107
+	CodePermissionError     ErrorCode = 108
+	CodeAuthenticationError ErrorCode = 109
+	CodeBadRequest          ErrorCode = 400
+	CodeUnauthorized        ErrorCode = 401
+	CodeForbidden           ErrorCode = 403
+	CodeNotFound            ErrorCode = 404
+	CodeConflict            ErrorCode = 409
+	CodeServerError         ErrorCode = 500
+)