read spoil timer with circuit condition

[Juliangta]

idea
- just having the possibility to read the spoil timer of various spoilable items
how?
- this would prefarably be done possible in a inserter
why?
- it is to be able to send fresh bioflux and science packs instead of sending half spoiled bio flux for the captive biter spawners

i didn't see any other posts mentioning this specific issue