Inventory questions - Githubissues

Health_status - L, D, and M. What is "M"?
Canopy_status - there are blank values; is this OK? What does SA stand for?
There are a number of different codes currently used for an unknown tree, including "unknown", "?", "snag", and "UNKNOWN". I'd like to standardize on one, ideally four letters to match everything else. How does "????" work?
Row 791 of the inventory table has "REDACT" in the DBH_cm column, which forces the entire column to be character, which isn't great. What is this? Can we change to a flag, so that DBH_cm is cleanly numeric please?

FoRTExperiment / FoRTE-mgmt