[优化] 更新数据库迁移逻辑，添加 v19 版本验证，重构隧道相关表结构

openflare_server/model/migrate/v16.go

@@ -11,7 +11,9 @@ type nodeV16 struct {
 	RelayBindPort int    `gorm:"column:relay_bind_port"`
 }
 
-type tunnelV16 struct{}
+type tunnelV16 struct {
+	ID uint `gorm:"primaryKey"`
+}
 
 type proxyRouteV16 struct {
 	UpstreamType string `gorm:"column:upstream_type;not null;default:'direct'"`
@@ -47,6 +49,9 @@ func migrateV16(ctx Context, db *gorm.DB, backend string) error {
 	if err := ctx.ApplyCurrentSchema(db, backend); err != nil {
 		return err
 	}
+	if err := db.AutoMigrate(&tunnelV16{}); err != nil {
+		return fmt.Errorf("auto migrate tunnelV16: %w", err)
+	}
 	if err := db.Exec("UPDATE nodes SET node_type = 'edge_node' WHERE node_type = '' OR node_type IS NULL").Error; err != nil {
 		return fmt.Errorf("backfill nodes.node_type: %w", err)
 	}
@@ -60,8 +65,13 @@ func validateV16(ctx Context, db *gorm.DB, backend string) error {
 	if err := ctx.ValidateDatabaseSchemaVersion(db, backend, 15); err != nil {
 		return err
 	}
-	if db == nil || !db.Migrator().HasTable(&tunnelV16{}) {
-		return fmt.Errorf("table tunnels is missing")
+	if !db.Migrator().HasColumn(&proxyRouteV16{}, "tunnel_node_id") {
+		if db == nil || !db.Migrator().HasTable(&tunnelV16{}) {
+			return fmt.Errorf("table tunnels is missing")
+		}
+		if !db.Migrator().HasColumn(&proxyRouteV16{}, "tunnel_id") {
+			return fmt.Errorf("column proxy_routes.tunnel_id is missing")
+		}
 	}
 	if !db.Migrator().HasColumn(&nodeV16{}, "node_type") {
 		return fmt.Errorf("column nodes.node_type is missing")
@@ -72,8 +82,5 @@ func validateV16(ctx Context, db *gorm.DB, backend string) error {
 	if !db.Migrator().HasColumn(&nodeV16{}, "relay_bind_port") {
 		return fmt.Errorf("column nodes.relay_bind_port is missing")
 	}
-	if !db.Migrator().HasColumn(&proxyRouteV16{}, "tunnel_id") {
-		return fmt.Errorf("column proxy_routes.tunnel_id is missing")
-	}
 	return nil
 }