fix(clinical): red flags, one crisis rule, callback after a crisis, one table of numbers

Clinical review of the questionnaires (ADR-013):
- Red-flag block first in stage 1 (config/instruments/red_flags.yaml); any «Да» stops the
  questionnaire with an acute alert and the help screen of its category.
- One crisis rule: the crisis screen opens at a HIGH C-SSRS risk only; moderate stops and goes
  to a psychiatrist (24 h as a guide), low is a flag with the safety plan. PHQ-9 item 9 with a
  negative screener is a discrepancy flag; without a completed screener it asks the C-SSRS at once.
  config/questionnaire.yaml: cssrs_positive_policy graded (C01).
- Every crisis leaves a callback task for the doctor on duty (post_crisis_call, one per patient)
  and the app asks how the person is the next day, the safety plan one tap away.
- Routing: risk and flags first, scales second; PCL-5 >= 50 no longer means a priority
  appointment (pcl5_severe is moderate on the dashboard too).
- Crisis numbers live only in config/texts/crisis.yaml; texts and the agent prompt refer to them
  via {phone:<key>}. Fixes the children's helpline offered to adults by the chat agent.

Refs #92

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

app/core/safety.py

@@ -395,6 +395,25 @@ def _crisis_cfg(path: Path = CRISIS_PATH) -> _CrisisCfg:
     return _CrisisCfg.model_validate(yaml.safe_load(path.read_text(encoding="utf-8")))
 
 
+_PHONE_REF = re.compile(r"\{phone:([a-z_]+)\}")
+
+
+def fill_phones(text: str, path: Path = CRISIS_PATH) -> str:
+    """Replace `{phone:<resource>}` with the number from the single table in config/texts/crisis.yaml.
+
+    Every patient text and prompt refers to the table instead of repeating a number, so a number is changed in one
+    place. An unknown resource fails loudly: a wrong number on the crisis screen must never pass silently.
+    """
+    resources = _crisis_cfg(path).resources
+
+    def number(m: re.Match[str]) -> str:
+        if m.group(1) not in resources:
+            raise ValueError(f"unknown crisis resource {m.group(1)!r}")
+        return resources[m.group(1)].phone
+
+    return _PHONE_REF.sub(number, text)
+
+
 def _render(body: str, resources: list[CrisisResource], doctor_notified: str, grounding: str) -> str:
     lines = [body.strip(), ""]
     for r in resources: