Add model identifier to vendor headers

[matejcik]

resolves #3028

this means that we currently can't build production versions of T2B1 because we don't have the signed headers

[TychoVrahe]

Prodtest VH for T2B1 is missing - is that because we don't have pubkeys yet?

It might be better to replace satoshilabs vendor image for T2B1 with something that T2B1 can display? Applies to unsafe VH too. It should save some flash space too.

Can't verify that pubkeys for T2B1 satoshilabs VH are correct.

[matejcik]

Prodtest VH for T2B1 is missing - is that because we don't have pubkeys yet?

yes

It might be better to replace satoshilabs vendor image for T2B1 with something that T2B1 can display? Applies to unsafe VH too. It should save some flash space too.

also yes

Can't verify that pubkeys for T2B1 satoshilabs VH are correct.

notion

[matejcik]

vendor images 64x64 b&w

i would like to test them with the bootloader emulator (some changes might be needed)

[TychoVrahe]

64x64 seems too much, but with 32x32 we could make it look like this, which seems reasonable (to me):

[TychoVrahe]

or we can just not show it. can't really fit "UNSAFE, DO NOT USE!" to right half of the screen and to split lines in the bootloader seems excessive.

[matejcik]

the layout engine can split lines already 🤷‍♀️

if we go with your design, i think the version number isn't supposed to be there?

[matejcik]

noting here for posterity that we're keeping the 64x64 images for now, but will most likely change them for the final version of the bootloader