We should be able to use an agentic loop without explicitly specifying maxIterations (#843)

Signed-off-by: Dmitrii Tikhomirov <chani.liet@gmail.com>

Author: treblereel

experimental/fluent/agentic/src/main/java/io/serverlessworkflow/fluent/agentic/LoopAgentsBuilder.java

@@ -31,6 +31,8 @@ public class LoopAgentsBuilder {
   private final FuncTaskItemListBuilder funcDelegate;
   private final ForTaskFunction forTask;
 
+  private int maxIterations = 1024;
+
   public LoopAgentsBuilder() {
     this.forTask = new ForTaskFunction();
     this.forTask.setFor(new ForTaskConfiguration());
@@ -56,7 +58,7 @@ public LoopAgentsBuilder subAgents(Object... agents) {
   }
 
   public LoopAgentsBuilder maxIterations(int maxIterations) {
-    this.forTask.withCollection(ignored -> IntStream.range(0, maxIterations).boxed().toList());
+    this.maxIterations = maxIterations;
     return this;
   }
 
@@ -67,6 +69,7 @@ public LoopAgentsBuilder exitCondition(Predicate<AgenticScope> exitCondition) {
 
   public ForTaskFunction build() {
     this.forTask.setDo(this.funcDelegate.build());
+    this.forTask.withCollection(ignored -> IntStream.range(0, maxIterations).boxed().toList());
     return this.forTask;
   }
 }