Document the gear-fit pass and add the changelog

Create CHANGELOG.md with the post-0.6.0 gear-fit entries and backfill the
recent release history. Update the implemented-features list, asset-tooling
notes, README links and verification counts (headless 229, Python 87).

MEMORY.md

@@ -74,7 +74,7 @@ Session memory for durable decisions, state, and gotchas. Keep concise, remove o
 
 - **Status (2026-11-01, after the NPC detail pass):** v0.6.0 is released. Post-v0.6.0 the
   realism pass, the visual-alignment pass and the NPC face/hand pass all landed. Headless
-  **228/228**, Python tooling **86/86**, `tools/check_screenshots.sh` **11 good / 0 bad**,
+  **229/229**, Python tooling **87/87**, `tools/check_screenshots.sh` **11 good / 0 bad**,
   `screen_designs.py compare` 11 good / 0 bad, `scene_concepts.py audit` all GOOD,
   `blender_assets.py audit` exit 0, `smoke_npc_budget` OK (16 avatars, 6.94 ms of 50 ms).
   `PLAN.md` is compact; README/architecture track the current controls, asset pipeline, CI and
@@ -618,7 +618,7 @@ Session memory for durable decisions, state, and gotchas. Keep concise, remove o
 - Joke Shop `door_staff_lines` are logged through `GameManager` (inspect / wand / refuse). They are not a separate dialogue UI.
 - Access loadout is implemented; do not re-fix `override_access` as if it were still unread.
 - `Save.SETTINGS_FILE` is declared and unused; settings persistence goes through `Save.load_settings()` / `save_settings()`.
-- Headless suite is **228/228**; the windowed smokes, screenshot compare and judge pass. Remaining visual follow-ups are in `TODO.md`.
+- Headless suite is **229/229**; the windowed smokes, screenshot compare and judge pass. Remaining visual follow-ups are in `TODO.md`.
 - Typed spawn signal extra args: handlers must accept the 4th `event: Dictionary` or Godot will not call them (`test_shift_coordinator_runs_a_shift` failed until `_on_spawn` took four args).
 - GDScript inference trap that broke the main scene: a `var` typed as a base class
   (`radial: CanvasLayer`) exposes script members as `Variant`, so `var x := radial.is_open` is a