feat: add TrackingTopologicalSorter #795
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TopologicalSorter.get_ready()returns a node only once. The tracking topological sorter keeps track which nodes are marked as done. Theget_available()method returns nodes again and again, until they are marked as done. The graph is active until all nodes are marked as done.Individual nodes can be marked as exclusive nodes.
get_availabletreats exclusive nodes special and returns:The class uses a lock for
is_activate`,get_available`, anddone, so the methods can be used from threading pool and future callback.