no deep hot end to step into here!
My point was that to dry cure you want a temp of around 60 - 65F (I appreciate there are various, fairly minor, differences for specifics products/needs) as well as 70ish% humidity (see earlier caveats again).
I think these are the temps for the curing process to work reliably and effectively and produce the right end product. Temps that the OP was referring to (0 - 2C) would slow or stop the necessary curing process.
As I said, you could use just RH and air movement to effectively 'dry' a sausage but this isn't at all the same as dry curing it in my view.
We can sometimes use fridges to rectify issues occasionally (such as case hardening etc) but this is retrospective correction of something that ideally wouldn't have happened and that very seldom does if things are right in the curing chamber.
An EHO expecting you to use a fridge running at 0 - 2C to cure sausage would IMO appear not to understand the process, I am sure, as you say, this can be overcome by a diligent approach to HACCP's etc (we had to do one for each different product) but also them doing a bit of basic reading.