Blueprint planner/builder: require reason when accessing expunged zones (#9608) #9633
+373
−237
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This is a followup to #9521, specifically driven by @smklein's
note
that the planner also accesses expunged zones, and we need to track
those reasons too. Doing this work revealed one case where the planner
was accessing them in a way that was going to cause problems with
pruning; that's fixed by #9550, and this PR is staged on top of it.