inconsistency between EdgePopulation.iter_connections and Edges.iter_connections

[joni-herttuainen]

EdgePopulation.iter_connection returns tuples of ints:

>>> list(circuit.edges["<pop_name>"].iter_connections(query_source, query_target)) 
[(164098, 164264),
 (157990, 164265),
...

Whereas Edges.iter_connections return tuples of CircuitNodeIds

>>> list(circuit.edges.iter_connections(query_source, query_target))
[(CircuitNodeId(population='hncx_neurons', id=164098),
  CircuitNodeId(population='hncx_neurons', id=164264)),
 (CircuitNodeId(population='hncx_neurons', id=157990),
  CircuitNodeId(population='hncx_neurons', id=164265)),
...

original reasoning, I guess, was that the ints in edge population case is enough since we know the populations but for clarity and consistency, they should both return CircuitNodeIds.