High ISO and enhanced UV/IR sensitivity mirrorless photo camera?

[Avaalon]

Hello. I recently sold my FS converted Sony A7s and looking to convert new full frame or crops mirrorless camera with ~20Mp resolution (in my opinion anything over 24Mp is overkill and lens sharpness is also bottleneck even with modern lens) that is more suitable for artwork documentation/multispectral investigation, as well artistic and low light photography/videography.  Main requirement is being better sensitivity in UV/VIS/IR spectrum (or even reaching SWIR) but features in newer models like IBIS, phase focusing, 4K recording, better viewfinder, high refresh rate, pixel shift (or other way to boost static object resolution) is also desirable.
If only there was a way to easily increase resolution of static images using Sony A7S III I think it would be best choice, maybe firmware can unlock pixel shift feature? I'm also thinking of moving from Sony to Canon  or even Nikon camera‘s since they seem to have better selection of good spec lenses and less IR hotspot problems. BTW I will also need a high quality lens that is fast and sharp both in IR and visible, liked Canon EF lens since they are popular and more affordable.
I loved the sensitivity and super high native ISO of A7s that after conversion essentially made it into a night vision device but I need an easy way to get higher true resolution photos of static objects without stiching visible. Higher resolution also helps with antialiasing , reduction of moire effect visible when photographing textiles, painting supports. My A7s after conversion had horrible moire effect. There are tossed ideas that Sony A7SIII has actually 48Mp pixels due to quad Bayer sensor design, that‘s at least in theory but is this possible in practice?
Interesting technology is pixel shift which can boost resolution  up to x4 times but it works best on static images what is exactly I need.
I‘m looking for a new technology sensor since most cameras are still stuck using the same outdated silicon CMOS sensors that have limited spectral sensitivity. Camera sensor did not change really much. Major shift was use of backlit CMOS sensros which are better f-stop in noise reduction and I read they are also more sensitive especially to UV. Sure there are small improovements like dual gain pixels, stacked or global shutter sensors but these novelties have no effect on spectral sensitivity?
I read about Canon experimental SPAD camera sensor technology that can use multiplied electron avalanche to amplify signal sort of like analog night vision devices but are still in their infancy. Nikon is also developing QIS sensors. Quantum dot three layer sensor are also in development that are Foveon-like. Even more amazing is graphene-enhanced CMOS. High sensitivity is really needed to reduce pixel and camera/lens size.
Are there any cameras that use different color filter mosaics with better IR/UV transmission such as RGBW? For  example it would be great to have  blue pixels more sensitive to UV and red pixels being sensitive more to infrared so that to get more interesting artistic color effects.
I'm also considering going one step further in conversion and also converting to a monochrome separate camera. I read that by removing Bayer filter sensitivity can be increased especially in UV (microlens removal can reduce sensitivity but maybe it's so bad with newer pixel designs). But color information will be lost permanently. I saw that there are for sale laser damaged full frame camera's so I could take a risk to perform monochrome conversion. And at the same I would get rid of UV blocking sensor cover. Modern camera sensors also may protective glass that has also AR multi coatings which block UV/IR. Can for example Sony A7III laser burned sensor be fixed after monochrome conversion?