Migration Trends 2025 — Assets pack (tables + charts)

Contents:
1) top-destination-countries-migrant-stock-2025.csv
   - Ranking of destination countries by international migrant stock (millions)
2) top-origin-countries-diaspora-stock-2025.csv
   - Ranking of origin countries by people living abroad (millions)
3) chart-top-destinations-2025.png
4) chart-top-origins-2025.png

Notes:
- Values are the same as used in the HTML blocks (rounded, in millions).
- Charts are rendered as static PNGs (fallback-friendly) with black labels (>=15px).
