Adding device feature category: NO₂, SO₂ and O₃

[prohand]

Hello,

Following a request about external integration, I have brought up these 3 new pieces of information:

Claude had indeed noted the blocking point:

The blocking point

The CLAUDE.md stated that NO₂, O₃, and SO₂ do not have a concentration category in Gladys and that only their sub-index could be published.

Is it possible to add these device functionality categories on par with PM10 and PM2.5, please?

Thank you

[pierre-gilles]

Request accepted