Add seed-macro-infra.ts with 144 macroeconomic data points (HCMC + Hanoi,
6 indicators, quarterly 2023-2025) and 15 infrastructure projects with
PostGIS coordinates (Metro Line 1, Thu Duc Innovation District, Ring Road 3,
Long Thanh Airport, Can Gio Bridge, etc.). Integrated into main seed pipeline.
Co-Authored-By: Paperclip <noreply@paperclip.ing>
