feat(family): deploy Single-Writer DuckDB backend, Mila parent cockpit & feeding analytics, and Moritz macro tracker

projects/duckdb-backend/tests/test_api_query.py

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+import pytest
+from fastapi.testclient import TestClient
+
+
+def test_generic_query_select(client: TestClient):
+    payload = {
+        "query": "SELECT count(*) AS cnt FROM v_sleep WHERE subject = 'mila'"
+    }
+    resp = client.post("/duckdb-api/v1/query", json=payload)
+    assert resp.status_code == 200
+    data = resp.json()
+    assert "rows" in data
+    assert len(data["rows"]) == 1
+    assert data["rows"][0]["cnt"] > 0
+    assert data["execution_time_ms"] < 50.0  # verifies sub-50ms execution
+
+
+def test_generic_query_disallowed_drop(client: TestClient):
+    payload = {"query": "DROP TABLE sleep;"}
+    resp = client.post("/duckdb-api/v1/query", json=payload)
+    assert resp.status_code == 400
+    assert "not permitted" in resp.json()["detail"]
+
+
+def test_generic_query_disallowed_insert(client: TestClient):
+    payload = {"query": "INSERT INTO sleep VALUES ('x', 'y')"}
+    resp = client.post("/duckdb-api/v1/query", json=payload)
+    assert resp.status_code == 400