[优化] 重构数据库迁移逻辑，添加版本管理和验证功能

openflare_server/model/migrate/v8.go

@@ -0,0 +1,39 @@
+package migrate
+
+import "gorm.io/gorm"
+
+func init() {
+	Register(V8())
+}
+
+func V8() Migration {
+	return Migration{
+		FromVersion: 7,
+		ToVersion:   8,
+		Migrate:     migrateV8,
+		Validate:    validateV8,
+	}
+}
+
+func migrateV8(ctx Context, db *gorm.DB, backend string) error {
+	if err := ctx.ApplyCurrentSchema(db, backend); err != nil {
+		return err
+	}
+	if err := ctx.BackfillOriginsFromProxyRoutes(db); err != nil {
+		return err
+	}
+	if err := ctx.BackfillProxyRouteSiteFields(db); err != nil {
+		return err
+	}
+	if err := ctx.EnsureProxyRouteSiteNameUniqueIndex(db); err != nil {
+		return err
+	}
+	if err := ctx.BackfillProxyRouteCertificateFields(db); err != nil {
+		return err
+	}
+	return ctx.BackfillProxyRouteDomainCertificateFields(db)
+}
+
+func validateV8(ctx Context, db *gorm.DB, backend string) error {
+	return ctx.ValidateDatabaseSchemaVersion(db, backend, 8)
+}