Call the reference curve what it is, and drop wording that reads as copying

The view transform's second curve is the DNG SDK's published reference
rendering — the ACR3 default curve applied by RefBaselineRGBTone — so
it is the "DNG Reference" curve in the panel, D21 and the code, not a
name borrowed from another product. Comments and docs that justified a
choice by another editor doing it ("as their Amount", "so a
photographer arriving from it finds the name") now give the actual
reason. The Vivid presets no longer describe themselves as reaching
for another editor's look; they are DarkRoom's own.

Factual mentions stay: which program wrote the library's DNGs, what
was measured against, and preset import. camera-profiles.md gains §15,
on starting a photograph from the edit it already carries.

core/dr-pipeline/presets/vivid.drpl

@@ -1,12 +1,8 @@
 drpl 1
 
-# Vivid: more colour than the default rendering, for the photographer used
-# to Lightroom's richer starting point (camera-profiles.md §9).
+# Vivid: more colour than the default rendering (camera-profiles.md §9).
 #
-# That difference is mostly Camera Raw's tone curve, not the camera
-# profile: Adobe Standard's look table, which D20 applies, desaturates dark
-# tones (camera-profiles.md §1). So these do the work themselves, and work
-# on every photograph — a JPEG, a body with no profile. They lean on
+# These do the work themselves, and work on every photograph — a JPEG, a body with no profile. They lean on
 # vibrance before saturation: vibrance lifts muted colours most and holds
 # skin back, so a frame gets richer before anything in it looks painted.
 # Saturation, which moves every colour alike, is used sparingly on top.