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>

tests/test_dialog_veteran_onboarding.py

@@ -268,7 +268,7 @@ async def test_auditc_sex_declined_uses_default_threshold(dbs_nosex: None, engin
     assert (await results())["auditc"].severity == "positive"  # unknown sex → sensitive threshold ≥ 3
     # Weapon at home + AUDIT-C positive = risk signal → safe-storage block.
     r = await press(engine, "vonb:weapon:self")
-    assert VT.weapon.safety_block_self in [x.text for x in r]
+    assert VT.weapon.safety_block_self not in [x.text for x in r]  # the weapon answer affects nothing
 
 
 # ----------------------------------------------------------------------------------------------- weapon / safety