Prepare the 0.10.0 release candidate

TODO.md

@@ -62,8 +62,9 @@ verify every distribution path. This is the next minor release after the 0.9.x p
       may land after the freeze. (Frozen 2026-11-03 after the 0.9.6 integration
       checkpoint; this pass is limited to release reliability, accessibility,
       balance evidence and packaging.)
-- [ ] Produce a release-candidate build with the tutorial, campaign, all three venues, Help,
-      accessibility settings and checkpoint/resume enabled.
+- [-] Produce a release-candidate build with the tutorial, campaign, all three venues, Help,
+      accessibility settings and checkpoint/resume enabled. (claimed; building
+      `0.10.0-rc.1` from a clean worktree)
 - [ ] Run at least five first-time-player sessions covering the tutorial and one full venue shift;
       record where players get stuck, misunderstand evidence or choose disproportionate escalation.
 - [ ] Triage findings by severity (P0/P1/P2) and fix every P0/P1 onboarding/accessibility issue;