Ship the 0.9.0 production-quality milestone

Add mixer/accessibility settings, caption/reduce-motion hooks, audio volume
clamping, a 24-NPC performance smoke and shortened coat/dress stride for hem
clipping. Record the explicit Godot 4.3-CI/4.7-local matrix and the 0.9
production scope. Headless 250/250, Python 94/94, 24-NPC budget smoke passes.

MEMORY.md

@@ -43,6 +43,7 @@ Session memory for durable decisions, state, and gotchas. Keep concise, remove o
 - RNG: NPC reactions and event scheduling are seedable for deterministic tests.
 
 - **Mouse look (v0.7.3):** guard look is handled in `GuardController._input()` (before GUI), not `_unhandled_input`; focus/click-back recaptures the cursor and the HUD is made mouse-transparent recursively. Regression tests cover yaw/pitch and HUD filters.
+- **v0.9.0 production pass:** CI/release baseline remains Godot 4.3; local dev is 4.7.2 with the version-adaptive light falloff. Audio settings are `master_volume`/`sfx_volume`/`ambience_volume`; accessibility has `reduce_motion` and `captions_enabled` (HUD log is the caption surface). Budget smoke is 24 NPCs (6.94 ms headless). Coat/dress stride is scaled to 0.76 to reduce hem clipping. Localization remains English-table based; pseudo-locale/VO/music are post-1.0.
 - **Radio submit fix (v0.8.1):** `RadioPanel.action_button` now connects `pressed` for normal reports; `button_down/up` remains exclusive to emergency hold-to-confirm. Regression test covers both modes.
 - **Campaign/v0.8.0:** `Campaign` owns Hollywood → Joke Shop → TV Studio progression. `campaign.json`, `shift_results.json`, `settings.json` and versioned `shift_state.json` persist separately; pause saves a checkpoint, review Continue advances, Settings resets with confirmation. Difficulty keys are `easy/normal/hard` (`ai_difficulty`); scripted QA bypasses tutorial unless `--tutorial` is passed. Help is searchable and generated from `InputBindings.REMAPPABLE`.
 - **Tutorial (0.8.0 work):** `docs/tutorial.md` is the eight-beat design; `src/game/tutorial.gd` is the pure state machine, `TutorialOverlay` is the non-blocking card, and `GameManager` wires it with a safe visitor, suppressed spawns, persisted completion/skip and Settings replay. Scripted test/capture runs bypass it unless `--tutorial` is passed; `smoke_tutorial.gd` covers completion/replay/skip.