chore(orm): add GORM v2 PoC playground and validation script

Author: kaikaila

playground/gorm_v2_migration/go.mod

@@ -0,0 +1,14 @@
+module github.com/YOUR_USERNAME/gorm_v2_migration
+
+go 1.24.1
+
+require (
+	github.com/go-sql-driver/mysql v1.7.0 // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.5 // indirect
+	github.com/mattn/go-sqlite3 v1.14.28 // indirect
+	golang.org/x/text v0.25.0 // indirect
+	gorm.io/driver/mysql v1.5.7 // indirect
+	gorm.io/driver/sqlite v1.5.7 // indirect
+	gorm.io/gorm v1.26.1 // indirect
+)

playground/gorm_v2_migration/go.sum

@@ -0,0 +1,78 @@
+// Copyright 2025 The Kubeflow Authors
+//
+// 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
+//
+//     https://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.
+
+// This file is a minimal proof-of-concept (PoC) to verify that GORM v2's basic APIs
+// (Open, AutoMigrate, Create, Find, Update, Delete) work correctly with MySQL.
+// The goal is to ensure functional compatibility before integrating GORM v2 into the main codebase.
+
+package main
+
+import (
+	"fmt"
+
+	"gorm.io/driver/mysql"
+	"gorm.io/gorm"
+)
+
+// Define model
+type User struct {
+	ID    uint   `gorm:"primaryKey"`
+	Name  string
+	Email string
+}
+
+func main() {
+	// Initialize GORM v2 with MySQL
+	dsn := "testuser:testpw@tcp(127.0.0.1:3306)/testdb?charset=utf8mb4&parseTime=True&loc=Local"
+	db, err := gorm.Open(mysql.Open(dsn), &gorm.Config{})
+	if err != nil {
+		panic("failed to connect database")
+	}
+
+	// Auto-migrate table schema
+	if err := db.AutoMigrate(&User{}); err != nil {
+		panic("failed to migrate")
+	}
+
+	// Insert data
+	db.Create(&User{Name: "Alice", Email: "[email protected]"})
+
+	// Query data
+	var user User
+	db.First(&user, "name = ?", "Alice")
+	fmt.Printf("User found: %+v\n", user)
+
+	// Find all users
+	var users []User
+	db.Find(&users)
+	fmt.Printf("All users: %+v\n", users)
+
+	// Update user email
+	db.Model(&user).Update("Email", "[email protected]")
+	fmt.Printf("Updated user: %+v\n", user)
+
+	// Delete user
+	db.Delete(&user)
+	fmt.Println("User deleted.")
+
+	// Verify deletion
+	var count int64
+	db.Model(&User{}).Count(&count)
+	fmt.Printf("Remaining users count: %d\n", count)
+
+	// Raw SQL: Show tables in MySQL
+	var tableNames []string
+	db.Raw("SHOW TABLES").Scan(&tableNames)
+	fmt.Printf("Tables in DB (via Raw): %v\n", tableNames)
+}