Update Location Code in Tender ID Generation Logic

- Changed the location code in the `generateTenderID` method from "EURO" to "EU" to accurately reflect the country code.
- This modification enhances the clarity and correctness of the tender ID generation process, ensuring adherence to Clean Architecture principles.

ted/scraper.go

@@ -1216,7 +1216,7 @@ func (s *TEDScraper) generateTenderID(t *tender.Tender) string {
 	parts = append(parts, s.padOrTruncate(s.unixMilliToDateString(t.IssueDate), 4))
 
 	// Location code (country code + region code, padded to 6 chars)
-	locationCode := "EURO"
+	locationCode := "EU"
 	if t.CountryCode != "" {
 		locationCode = t.CountryCode
 	}