Adapt obtaining selected subgraph

[lmanan]

Minor change to existing code.

Select nodes and edges for which the value of the [node/edge] selected indicator variable > 0.5, instead of checking for them being equal to 1, since the latter can skip nodes and edges for which the value of the indicator variable is 1.0000002 etc.

Referred here.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.71%. Comparing base (5415cd4) to head (06608fe).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #94   +/-   ##
=======================================
  Coverage   93.71%   93.71%           
=======================================
  Files          33       33           
  Lines         812      812           
=======================================
  Hits          761      761           
  Misses         51       51           

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[tlambert03]

Thanks!