v1.1.0: Alembic, pytest, домен и документация

- Миграции PostgreSQL через Alembic; DDL убран из lifespan приложения.
- Тесты: health, status, ingress Grafana; моки Vault/Grafana/Forgejo.
- Пакет onguard24/domain/ (сущности, шина событий), docs/DOMAIN.md.
- Обновлены README, CHANGELOG, ARCHITECTURE.

Made-with: Cursor

tests/test_health.py

@@ -0,0 +1,13 @@
+from fastapi.testclient import TestClient
+
+
+def test_health(client: TestClient) -> None:
+    r = client.get("/health")
+    assert r.status_code == 200
+    assert r.json()["status"] == "ok"
+    assert r.json()["service"] == "onGuard24"
+
+
+def test_health_api_v1(client: TestClient) -> None:
+    r = client.get("/api/v1/health")
+    assert r.status_code == 200