feat(execution): add constructor to ExecutionStep for custom stepId

- Introduced a new constructor in ExecutionStep to allow setting a custom stepId.
- Updated MapReducePlanExecutor to utilize the new constructor, ensuring copied steps maintain their original stepId for consistency.

Author: answeropensource

spring-ai-alibaba-jmanus/src/main/java/com/alibaba/cloud/ai/manus/runtime/entity/vo/ExecutionStep.java

@@ -39,6 +39,10 @@ public ExecutionStep() {
 		this.stepId = "step-" + UUID.randomUUID().toString();
 	}
 
+	public ExecutionStep(String stepId) {
+		this.stepId = stepId;
+	}
+
 	@JsonIgnore
 	private Integer stepIndex;
 

spring-ai-alibaba-jmanus/src/main/java/com/alibaba/cloud/ai/manus/runtime/executor/MapReducePlanExecutor.java

@@ -401,10 +401,9 @@ private List<ExecutionStep> copyMapSteps(List<ExecutionStep> originalSteps, Stri
 		List<ExecutionStep> copiedSteps = new ArrayList<>();
 
 		for (ExecutionStep originalStep : originalSteps) {
-			ExecutionStep copiedStep = new ExecutionStep();
+			ExecutionStep copiedStep = new ExecutionStep(originalStep.getStepId());
 			// Preserve the original stepId to maintain consistency with pre-created
 			// records
-			copiedStep.setStepId(originalStep.getStepId());
 			copiedStep.setStepIndex(originalStep.getStepIndex());
 			copiedStep.setStepRequirement(originalStep.getStepRequirement());
 			copiedStep.setTerminateColumns(originalStep.getTerminateColumns());