feat: crisis message after the test and non-blocking; weapon answer triggers nothing; ЕМИАС demo = Никита

- CRISIS_BLOCKING (default off for the demo): a crisis no longer locks the dialog; the message and the
  doctor's acute alert still happen. The clinical protocol (blocking, immediate stop) stays behind the flag and
  keeps its tests.
- Crisis signals inside a questionnaire (intake red flags, high C-SSRS, PHQ-9 item 9) no longer stop it: the
  test is finished and the crisis message comes at the end; the doctor's alert is raised at once/at the end.
- Weapon access: asked and stored, triggers nothing (rule disabled, no red flag, no safety block).
- ЕМИАС demo persona is «Никита В.»; the one-click demo stays «Андрей С.».

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

config/instruments/red_flags.yaml

@@ -17,6 +17,8 @@ items:
 - id: rf_weapons
   text: Есть ли у Вас дома или рядом доступ к оружию?
   category: null
+  # Asked and stored, but NOT a stop rule (team decision 2026-10-04: weapon ownership is common in Russia).
+  trigger: false
 - id: rf_violence
   text: Угрожает ли Вам сейчас кто-то дома или применяет к Вам насилие?
   category: domestic_violence