Added tests/ for CI.

tests/test-health.py

@@ -0,0 +1,11 @@
+#
+# Tiny test to pass CI, just checks the health endpoint to ensure API running.
+#
+from fastapi.testclient import TestClient
+from app.main import app
+
+def test_healthz():
+    client = TestClient(app)
+    r = client.get("/healthz")
+    assert r.status_code == 200
+    assert r.json() == {"ok": True}