feat(#41): add syb_product CLI migration file

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

server/cmd/migrate/migration/version-local/1786700700000_syb_product_import.go

@@ -0,0 +1,27 @@
+package version_local
+
+import (
+	"runtime"
+
+	goautomigrations "go-admin/app/goauto/migrations"
+	"go-admin/cmd/migrate/migration"
+	common "go-admin/common/models"
+
+	"gorm.io/gorm"
+)
+
+// This migration adds the independent syb_product import table (#41). It is
+// additive: no existing table is modified.
+func init() {
+	_, fileName, _, _ := runtime.Caller(0)
+	migration.Migrate.SetVersion(migration.GetFilename(fileName), migrateSYBProductImport)
+}
+
+func migrateSYBProductImport(db *gorm.DB, version string) error {
+	return db.Transaction(func(tx *gorm.DB) error {
+		if err := goautomigrations.Migrate(tx); err != nil {
+			return err
+		}
+		return tx.Create(&common.Migration{Version: version}).Error
+	})
+}