https://www.mdpi.com/1420-3049/26/14/4113 In this paper it seems to suggest that you would be fine decarbing up to 135°C (or 275°F) but at that temp you would only want to decarb for ~15 minutes (based on figure 8).
Based on figure 7, decarbing at 115°C (or 240°F) for 30 minutes would convert just around half of your THC-A to THC, so 60 minutes would convert around 75%. Most places recommend something around this level because it is easier to not mess up 30-60 minutes than to not mess up not more than 15 minutes, and you don’t need to convert ALL of it in order to get a functional product.
Disclaimer: I have relatively little experience making edibles.
From the article:
“The researchers trained 14 sighted and 12 blind people for between two and three hours twice a week over 10 weeks. They started by teaching participants to produce mouth clicks, then trained them on three tasks. The first two involved judging the size or orientation of objects. The third involved navigating virtual mazes, which participants moved through with the help of simulated click-plus-echo sounds tied to their positions.”