Flash out API test suite

backend/tests/test_app_health.py

@@ -0,0 +1,14 @@
+def test_root_returns_api_metadata(client):
+    response = client.get("/")
+
+    assert response.status_code == 200
+    assert response.json()["message"] == "Airfield PPR API"
+    assert response.json()["docs"] == "/docs"
+
+
+def test_health_check_reports_database_connection(client):
+    response = client.get("/health")
+
+    assert response.status_code == 200
+    assert response.json()["status"] == "healthy"
+    assert response.json()["database"] == "connected"