SeriesServiceImpl.markAsSimilar(): mark multiple series at once in DAO

[0pdd]

The puzzle 1448-eb3f0fe6 from #1448 has to be resolved:

mystamps/src/main/java/ru/mystamps/web/feature/series/SeriesServiceImpl.java

Line 434 in 2f40baa

// @todo #1448 SeriesServiceImpl.markAsSimilar(): mark multiple series at once in DAO

The puzzle was created by Slava Semushin on 21-Jun-20.