refactor: validate both country and iso2 fields in location filtering (#3394)

Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>
Co-authored-by: Ido Shamun <idoshamun@users.noreply.github.com>

Author: idoshamun

src/common/opportunity/parse.ts

@@ -226,8 +226,14 @@ export async function parseOpportunityWithBrokkr(
               return loc;
             })
             .filter((loc) => {
-              // Only keep locations with valid country
-              return loc?.country && loc.country.trim().length > 0;
+              // Only keep locations with valid country and iso2
+              // Both are required for downstream processing in gondul
+              return (
+                loc?.country &&
+                loc.country.trim().length > 0 &&
+                loc?.iso2 &&
+                loc.iso2.trim().length > 0
+              );
             })
         : [],
     };