todo: close character development section (all items done)

Removes the stale - active - session suffix from the Character development
heading; the idle pose, warm skin, NPC prefab, and stable-naming items are all
done. The review-scene section above it also has no open items.

TODO.md

@@ -69,7 +69,7 @@ Owner: this session. Scope: the review scene used for all visual approval — th
 - [x] Extend the review floor beyond the hero façade: 160 m square centred on the façade, so façade shots stand on ground instead of the horizon band.
 - [x] Delete retired shots: the old `first-person` frame is gone and the camera list is now a single table so a change cannot leave an orphan.
 
-### Character development - active - 01a1b26b-3c94-707f-9665-2f6b4a79b564
+### Character development
 
 The MPFB character asset is planned as the NPC template (see `ROADMAP.md`). Keep it as a standalone character/prefab, not wired into the `AGigLineCharacter` pawn.