[AZ-219] Scaffold onboard runtime project

Add the initial source, test, infrastructure, CI, configuration, and evidence-path scaffold so dependent implementation tasks have stable package and runtime boundaries.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/blackbox/run_blackbox.py

@@ -0,0 +1,18 @@
+"""Black-box runner entry point.
+
+Future scenarios should call only public runtime inputs and outputs: replay frames,
+telemetry, offline cache, MAVLink output, status events, and FDR artifacts.
+"""
+
+from pathlib import Path
+
+
+def main() -> int:
+    reports_dir = Path("data/test-results")
+    reports_dir.mkdir(parents=True, exist_ok=True)
+    (reports_dir / "blackbox_smoke.txt").write_text("blackbox scaffold ready\n", encoding="utf-8")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())