fix!: use Viewtype::File for messages with invalid images, images of unknown size, huge images (#6825)

[iequidoo]

Fix #6825
Thanks to @ivan-cx. JSON-RPC tests pass, so this can be merged to main, but i want everyone to agree on the image size limit (~8.3 Mpx).

[ivan-cx]

Thank you @iequidoo for the review and support! And @r10s for setting the label "good first issue" 👍

The limit of 8294400 pixels is chosen from 4k screen resolution (3840 × 2160) and comes to 33177600 bytes of uncompressed memory consumption, given 32 bit per pixel.

[r10s]

8mp is too strict, just checked a random photo from iphone13 (already some years old) having 12mp, probably newer ones have more

idea is to deal with incredibly large images, no image taken from a system camera (panorama aside) should fall in that category - in practise, they also never made problems, as mp scale to age of phone and ram, at least roughly

EDIT: does this affect also recoding of oitgoing images? if not, at least "happy path" of sending images around would work. but even then, i would use a farer limit - chrrently we have none, so there is no need to be too strict

[iequidoo]

I think it'd be better to use some percentage of the RAM size, otherwise photos taken by new devices can't be displayed on old ones. sysinfo crate provides total_memory(), we depend on this crate anyway. OTOH if the user imports a backup from a device with bigger RAM, the same problem happens. So Viewtype reported by Core should be dynamic, not just what is stored in the db. All this sounds complex, so i suggest to just increase the limit to 32 Mpx for now. CC @ivan-cx

[ivan-cx]

I agree with idea to increaste up to 32 megapixels. I think, up to ~50 megapixels should be OK.

This limit does not affect sending pictures, there are other (much stricter) conversion rules applied, if i understand correctly.

[iequidoo]

I increased the limit to 35 Mpx. Can increase it to 50 Mpx, but then need to regenerate the test data. CC @ivan-cx

[Hocuri]

I don't have an opinion and don't feel the need to form one, I think there are enough ppl discussing already, and I trust that you are making a good decision :)

[iequidoo]

Increased the limit to 50 Mpx. Some modern cameras have >= 40 Mpx. And let's merge this, even a high limit is better than no limit at all.

Still need someone's approval because i made some changes.