refactor: change type of SitemapInfoDto.id from Integer to String

Required for containing slugs of entities like collection, category etc

Part of #1605

Author: php-coder

Diff for: src/main/java/ru/mystamps/web/feature/series/RowMappers.java

@@ -37,7 +37,7 @@ private RowMappers() {
 		throws SQLException {
 
 		return new SitemapInfoDto(
-			rs.getInt("id"),
+			rs.getString("id"),
 			rs.getTimestamp("updated_at")
 		);
 	}

Diff for: src/main/java/ru/mystamps/web/feature/series/SitemapInfoDto.java

@@ -27,6 +27,6 @@
 @ToString
 @RequiredArgsConstructor
 public class SitemapInfoDto {
-	private final Integer id;
+	private final String id;
 	private final Date updatedAt;
 }

Diff for: src/main/java/ru/mystamps/web/feature/site/SitemapController.java

@@ -87,7 +87,7 @@ private static String createUrlEntry(DateFormat dateFormatter, SitemapInfoDto it
 
 	private static String createLocEntry(SitemapInfoDto item) {
 		return SiteUrl.PUBLIC_URL
-			+ SeriesUrl.INFO_SERIES_PAGE.replace("{id}", String.valueOf(item.getId()));
+			+ SeriesUrl.INFO_SERIES_PAGE.replace("{id}", item.getId());
 	}
 
 	private static String createLastModEntry(DateFormat dateFormatter, SitemapInfoDto item) {

Diff for: src/test/java/ru/mystamps/web/service/TestObjects.java

@@ -137,7 +137,7 @@ public static ImageDto createImageDto() {
 	}
 
 	public static SitemapInfoDto createSitemapInfoDto() {
-		return new SitemapInfoDto(Random.id(), Random.date());
+		return new SitemapInfoDto(String.valueOf(Random.id()), Random.date());
 	}
 
 	@SuppressWarnings("checkstyle:magicnumber")