ClamAV needs newer rust

Hi,

I've been preparing clamav upload for stable and noticed that one of its
rust bits requires rustc 1.87.0. There was once rust-web but this is
gone now.
I could try to downgrade it but there was a bug against an earlier
version where it failed to read (some) .tiff files and fix was a newer
rust component for it. Wouldn't be surprised if something similar did
happen for jpeg, too (the package asking for newer rustc is zune-jpeg).

The NEWS file for 1.4.4 mentiones rustc 1.87 as the minimum.

I guess the only way forward is via -bpo?

Sebastian