feat(backend): API stage 1 on real data instead of fixtures

Doctor list/card/alerts/ack/connect, dialog events/outbox/history and demo
controls now read the identity and clinical DBs. Rule-based discontinuation
risk index, trend, adherence; every doctor read is audited.

Refs #12

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

tests/test_contracts.py

@@ -21,11 +21,10 @@ async def test_stubs_are_usable() -> None:
         await session.configure()
 
 
-def test_api_fixture_routes() -> None:
+def test_api_fixtures_and_clock() -> None:
+    # Routes read the DB since #12 (covered by tests/test_api_*.py); fixtures stay as schema-valid reference data.
+    from app.api import fixtures
+
+    assert fixtures.card("tok-andrey") is not None and fixtures.PATIENTS[0].status_color == "red"
     with TestClient(app) as c:
-        patients = c.get("/api/v1/doctors/doc-smirnova/patients").json()
-        assert patients[0]["status_color"] == "red"
-        card = c.get("/api/v1/patients/tok-andrey", params={"doctor_id": "doc-smirnova"}).json()
-        assert card["safety_plan"] and card["series"]
-        assert c.post("/api/v1/dialog/tok-andrey/events", json={"type": "text", "text": "ok"}).status_code == 200
         assert c.get("/api/v1/demo/clock").json()["virtual"] is True