Address PR review comments: add try-catch, @OverRide annotations, and fix Javadoc

Author: GaneshPatil7517

dolphinscheduler-master/src/main/java/org/apache/dolphinscheduler/server/master/engine/workflow/statemachine/WorkflowRunningStateAction.java

@@ -49,7 +49,15 @@ public void onStartEvent(final IWorkflowExecutionRunnable workflowExecutionRunna
 
         // Initialize the workflow execution graph if not already initialized
         // This is deferred from command handling to reduce transaction time
-        workflowExecutionRunnable.getWorkflowExecuteContext().initializeWorkflowExecutionGraph();
+        try {
+            workflowExecutionRunnable.getWorkflowExecuteContext().initializeWorkflowExecutionGraph();
+        } catch (Exception e) {
+            log.error("Failed to initialize workflow execution graph", e);
+            final WorkflowEventBus workflowEventBus =
+                    workflowExecutionRunnable.getWorkflowExecuteContext().getWorkflowEventBus();
+            workflowEventBus.publish(WorkflowFailedLifecycleEvent.of(workflowExecutionRunnable));
+            return;
+        }
 
         final IWorkflowExecutionGraph workflowExecutionGraph =
                 workflowExecutionRunnable.getWorkflowExecuteContext().getWorkflowExecutionGraph();

dolphinscheduler-master/src/main/java/org/apache/dolphinscheduler/server/master/runner/WorkflowExecuteContext.java

@@ -80,10 +80,11 @@ public WorkflowExecuteContext(Command command,
      * Initialize the workflow execution graph using the assembler.
      * This method should be called when the workflow is ready to start execution,
      * typically during the handling of WorkflowStartLifecycleEvent.
-     *
-     * @throws IllegalStateException if the execution graph is already initialized
-     *         or no assembler is available
+     * <p>
+     * If the execution graph is already initialized or no assembler is available,
+     * this method returns without making any changes.
      */
+    @Override
     public void initializeWorkflowExecutionGraph() {
         if (workflowExecutionGraph != null) {
             return;
@@ -101,6 +102,7 @@ public void initializeWorkflowExecutionGraph() {
     /**
      * Check if the workflow execution graph has been initialized.
      */
+    @Override
     public boolean isWorkflowExecutionGraphInitialized() {
         return workflowExecutionGraph != null;
     }