Refs #23586: Add API_REST to send availabe tasks_id to the frontend

Signed-off-by: Javier Gil Aviles <javiergil@eprosima.com>

Author: Javier Gil Aviles

sustainml_cpp/include/sustainml_cpp/orchestrator/OrchestratorNode.hpp

@@ -232,6 +232,11 @@ class OrchestratorNode
      */
     void terminate();
 
+    /**
+     * @brief Return all TaskIds currently known by the orchestrator (in-memory).
+     */
+    std::vector<types::TaskId> get_all_task_ids();
+
 protected:
 
     /**