If I were in a situation like that I would reach out for advice to some religious authority the person in question trusts.
There are widely accepted fairly common sense exceptions for saving lives. [1] That could maybe apply to an automatically activating fire sprinkler. Only someone well versed in the scriptures could say for certain. (And only they would be believed anyway.)
Even about the emergency lighting one can probably find a workaround. For example could it be wired so it is always on via a timer during shabbat?
The point with discussing these with a religious authority is manifold. They might better know how to mediate. In both directions! They might explain to the engineers what is and isn't a sticking point. Similarly they could explain if a given technique is permissible to the person who worries about them. Or alternatively they might have heard solutions others have employed in the past previously.
I think I'd prefer that they just say "deal with it - this is real". How many different sets of beliefs do we need to accommodate? How many "mediations" do we need to do to use fire sprinklers?! What if they are incompatible? Whose religion "wins" if one stays one thing but one says the other?
The solution is obvious: religion and beliefs should not be a factor in these sort of things. We in the UK are a secular society with strong separations between state and religion, so this sort of behaviour should be treated for what it is.
There are widely accepted fairly common sense exceptions for saving lives. [1] That could maybe apply to an automatically activating fire sprinkler. Only someone well versed in the scriptures could say for certain. (And only they would be believed anyway.)
Even about the emergency lighting one can probably find a workaround. For example could it be wired so it is always on via a timer during shabbat?
The point with discussing these with a religious authority is manifold. They might better know how to mediate. In both directions! They might explain to the engineers what is and isn't a sticking point. Similarly they could explain if a given technique is permissible to the person who worries about them. Or alternatively they might have heard solutions others have employed in the past previously.
1: https://en.wikipedia.org/wiki/Pikuach_nefesh