In WT-12390 the checkpoint states were changed from explicit #define}}s to an {{enum. The change was simple but has repercussions on developer productivity and triaging FTDC.

While looking at a lot of FTDC, I was comparing the checkpoint progress state in t2. I could see it moving from one to other states. I saw that "state 4" was getting increasingly longer with each checkpoint in one run.

I went to look for exactly what checkpoint state 4 is and there is no way to determine it now that states are enum instead of defined. I had to visually/manually count from the top of the list. This is very error prone and could be very difficult to maintain going forward if one accidentally looks at a different codebase and a state has been added or removed.

I suggest WT goes back to using #define for that state especially given it is visible to all via statistics.