feat: 支持工作流代码节点 Python 执行引擎

- easyflow-module-ai: 新增 PythonRuntimeEngine、不可用引擎降级实现与引擎能力服务

- easyflow-module-ai: 在 TinyFlowConfigService 注册 python/py 引擎并增加启动探测与可用性日志

- easyflow-api: 新增 /api/v1/workflow/supportedCodeEngines 能力查询接口

- easyflow-starter: 增加 node.code-engine.python 配置项默认值

- Dockerfile: 安装 python3 运行时以支持容器内执行

- test: 增加 PythonRuntimeEngineTest 覆盖成功、语法错误、超时、输出限制、命令缺失场景

- chore(ui-admin): 更新 cspell 词典

easyflow-api/easyflow-api-admin/src/main/java/tech/easyflow/admin/controller/ai/WorkflowController.java

@@ -12,6 +12,7 @@ import org.springframework.util.StringUtils;
 import org.springframework.web.bind.annotation.*;
 import org.springframework.web.multipart.MultipartFile;
 import tech.easyflow.ai.entity.Workflow;
+import tech.easyflow.ai.easyagentsflow.service.CodeEngineCapabilityService;
 import tech.easyflow.ai.service.BotWorkflowService;
 import tech.easyflow.ai.service.ModelService;
 import tech.easyflow.ai.service.WorkflowService;
@@ -55,6 +56,8 @@ public class WorkflowController extends BaseCurdController<WorkflowService, Work
     private ChainParser chainParser;
     @Resource
     private TinyFlowService tinyFlowService;
+    @Resource
+    private CodeEngineCapabilityService codeEngineCapabilityService;
 
     public WorkflowController(WorkflowService service, ModelService modelService) {
         super(service);
@@ -160,6 +163,12 @@ public class WorkflowController extends BaseCurdController<WorkflowService, Work
         return Result.ok(res);
     }
 
+    @GetMapping("/supportedCodeEngines")
+    @SaCheckPermission("/api/v1/workflow/query")
+    public Result<?> supportedCodeEngines() {
+        return Result.ok(codeEngineCapabilityService.listSupportedCodeEngines());
+    }
+
     @Override
     public Result<Workflow> detail(String id) {
         Workflow workflow = service.getDetail(id);
@@ -210,4 +219,4 @@ public class WorkflowController extends BaseCurdController<WorkflowService, Work
         }
         return null;
     }
-}
+}