schemas/VegCore/VegCore.ERD.mwb: made place_path and coordinates globally-scoped rather than per-datasource, so that there is only one geovalidation row for each combination of them rather than one per datasource place. added globally-scoped validatable_place table that stores combinations of place_path and coordinates, and made geovalidation extend it (since geovalidation provides optional fields and is 1:1 with it).
schemas/VegCore/VegCore.ERD.mwb: made place_path and coordinates globally-scoped rather than per-datasource, so that there is only one geovalidation row for each combination of them rather than one per datasource place. added globally-scoped validatable_place table that stores combinations of place_path and coordinates, and made geovalidation extend it (since geovalidation provides optional fields and is 1:1 with it).