Darktable is unable to find camera and lens profiles for its lens correction
module on OpenSUSE tumbleweed in spite of those profiles already existing in
lensfun.

Apparently darktable requires liblensfun1, which is no longer provided in the
Tumbleweed repository. I had an older version somehow kept on my system through
updates (didn't really pay attention). Removing it breaks darktable's
dependencies and removes the lens correction module entirely from the software.

I added KDE's Extra repository and installed liblensfun1 through that, but the
original problem of lens profiles not being loaded returns.