Record what 0.20.0 closes and leaves open in FR-DEV-3e

The DCP half that outstanding.md listed as deferred is built (D20).
What stays open is the profiles directory, which does not sync, and
the profile tone curve and baseline exposure, which are read and not
applied — and which camera-profiles.md §1 measured as where the rest of
the gap to Lightroom's colour is.

docs/dev/outstanding.md

@@ -53,6 +53,13 @@ left outstanding, and its DCP half stays deferred as before. §4's FR-DSP-2 and
 record the one case that now tiles, a linear DNG larger than one texture, and §11 the merge's frame
 choice, which changes how FR-MRG-5 is met rather than whether.
 
+**And for 0.20.0.** FR-DEV-3e's DCP half is built (D20, [camera-profiles.md](camera-profiles.md)):
+the HueSatMap and LookTable from a DNG's embedded profile or a matched `.dcp`. Two pieces stay
+open, both named in that design's §6: the profiles directory does not sync, so a CR2 can render
+with a copied profile on one device and without it on another; and `ProfileToneCurve` and
+`BaselineExposure` are read and not applied. The measurement in its §1 says the second is where the
+remaining gap to Lightroom's colour lies.
+
 ---
 
 ## 1. Plugins — post-v1 since 2026-09-19