Plan the 0.9.9-1.0.0 roadmap and re-evaluate the NPC base

Move the gap analysis and risks into PLAN.md, version the character track
(0.9.9 rig correction, 0.9.10 roster) and split 0.9.11-0.9.12 polish and
verification out of the old 0.10.0 milestone. Add roadmaps to 0.10.0, 0.11.0
and 1.0.0, record the Quaternius face-fidelity gate and the rest-relative
pose finding in MEMORY.md, and move the completed 0.9.7 and pose-harness
sections to DONE.md.

docs/development-status.md

@@ -34,9 +34,10 @@ and the active order/gaps in [`TODO.md`](../TODO.md).
 ## Known gaps
 
 - External first-time-player sessions and balance sweeps are not completed.
-- The Quaternius NPC base migration is planned, not shipped. The current 12-character
-  procedural library and the MakeHuman head remain fallbacks until the Quaternius
-  12-variant baseline passes review.
+- The Quaternius NPC base migration is planned, not shipped: the arm-down skin export and the
+  rest-relative pose composition are the open blockers (`0.9.9`), and the roster rollout is
+  `0.9.10`. The current 12-character procedural library and the MakeHuman head remain the
+  tested fallbacks until the face/silhouette gate is approved.
 - Accessibility/localization acceptance, target-hardware profiling, macOS
   signing/notarization and AI/storefront legal approval remain open.
 - Live 3D replay, recorded VO/music, more venues and seasonal content are future