[SCIP] Making sure that the same branching decision is not done twice

[myroslav]

Dear SCIP community,


I wondered how I could store branching decisions in the nodes of the 
branching tree.  I don't  use the branching decisions for pricing, I 
just want to make sure in the branching callback BRANCHEXECLP that I 
don't do the same branching decision that was done earlier on the path 
to the root, therefore, I was not sure if it's also a good idea to use 
"marker constraints" as suggested in one of the FAQs.


Sincerely,

Myroslav