camera-profiles.md §13: the derived sync pass gains a profiles step,
after the catalog and before the place, that exchanges the profiles
directory with <library>/.darkroom-derived/profiles. Profiles are
immutable and named for what they hold, so name and size decide: it
uploads what the server lacks or holds at another size and downloads
what this device lacks — parsed before it is kept, written beside its
name and renamed — then reloads the set, so a profile copied out of a
DNG on the desktop renders the body's CR2s on the tablet after its
next sync. Like the place it never fails the pass. Not a catalog
table: a schema change would stop an older peer merging at all.
Labels for the view transform's new curve choice: Curve, Camera Raw,
Sigmoid.