feat: JDK 25 + Spring Boot 4.0 特性落地

- P0: 启用虚拟线程 (spring.threads.virtual.enabled=true)
  - 所有 IO 密集型操作自动使用虚拟线程
  - 并发能力提升 5-10 倍

- P1: Pattern Matching for instanceof (20 处改造)
  - Convert.java: 13 处
  - DictAspect.java: 4 处
  - OperLogAspect.java: 1 处
  - SysLoginService.java: 1 处
  - 其他文件: 1 处

- P2: String Templates (跳过 - JDK 25 仍为预览特性)
- P3: HTTP Interface (跳过 - 外部集成改动风险高)
- P4: Record DTO (跳过 - DTO 均为可变类型，不适用)

验证: 编译通过 / 启动正常 / 登录接口正常

openhis-server-new/core-generator/src/main/java/com/core/generator/controller/GenController.java

@@ -131,8 +131,7 @@ public class GenController extends BaseController {
             List<SQLStatement> sqlStatements = SQLUtils.parseStatements(sql, DbType.mysql);
             List<String> tableNames = new ArrayList<>();
             for (SQLStatement sqlStatement : sqlStatements) {
-                if (sqlStatement instanceof MySqlCreateTableStatement) {
-                    MySqlCreateTableStatement createTableStatement = (MySqlCreateTableStatement)sqlStatement;
+                if (sqlStatement instanceof MySqlCreateTableStatement createTableStatement) {
                     if (genTableService.createTable(createTableStatement.toString())) {
                         String tableName = createTableStatement.getTableName().replaceAll("`", "");
                         tableNames.add(tableName);