Can’t you just use a Fibaro switch behind the wall-mounted-switch, and bypass the currect to the tradfi bulbs so they always have power? Pressing the swicth will be noticed by Homey so you can start a flow toggling the tradfi bulbs.
Well, wiring it like that has 2 problems/issues:
-if you dont put it in series with the fibaro switch it only works if homey, AND your flow works, in series it will work directly afaik, so even when homey is down.
you wont be able to cut the power in the room.
So if you paint the room, unscrewing the fixture you would have to turn off the main bracket of the house to unpower it. Or you might get shocked. And if im correct it actually isnt even legal following the building rules (Bouwbesluit in the Netherlands)
I had a similar topic recently:
I dont have a homey yet tho, so not quite sure, but i do know some electronics