generate new tags (#2934)

Co-authored-by: scraly <2543381+scraly@users.noreply.github.com>

Author: scraly

TAGS.csv

@@ -3002,3 +3002,6 @@ event_id,tag1,tag2,tag3,tag4,tag5,tag6
 2026-06-29-AI Engineer World's Fair 2026,tech:python,topic:data,topic:open-source,language:english
 2026-10-15-Longhorn PHP,tech:python,topic:data,topic:open-source,language:english
 2026-10-24-SQLSaturday - Minnesota 2026,tech:python,topic:data,topic:open-source,language:english
+2026-05-19-Backstage Finland User Group Meetup,tech:backstage,topic:open-source,language:english
+2026-10-03-DDD Perth 2026,tech:dotnet,topic:architecture,language:english
+2026-10-16-OmniOpenCon 2026,tech:open-source,topic:omnichannel,language:english