clarify FIXME and point to related issues

Phys/FunctorCore/include/Functors/Utilities.h

@@ -124,7 +124,10 @@ namespace Functors::detail {
      * was configured correctly and already holds our input in ExtraInputs
      *
      * For more info on the logic please see the detailed explanation of how
-     * Functors obtain their data dependencies in FIXME(Link to where?)
+     * Functors obtain their data dependencies in...
+     * FIXME A global overview documentation of the functor framework is still
+     * being worked on see Moore#284, FunctorFactory specific follow up in
+     * Rec#304
      *
      * @param handle This handle will be initialized
      * @param alg Algorithm/Tool which owns this functor