So I ended up resorting to just making a bunch of presets and running them in a playlist. I choose 72, which was reasonably close to 1%, but still divisible in my 288 strip. Thankfully Settings > Security & Updates has the ability to export and import the JSON file, so this wasn’t too painful. However, you have to make sure to run the file through a pretty strict JSON validator and even remove any unnecessary trailing commas.
I’ve attached my file in case it helps anyone.
wled_presets_Sunrise Light v5.txt (13.1 KB)
But now I’ve found another issue. For the second half of the sunrise, I’m using the nightlight function and can’t seem to get it to work with the white channel. I’ve posted here in case anyone has any suggestions.