New achievement: Specialist

[shippy]

What's the achievement name? Specialist

What are the criteria for awarding this achievement? Someone has received (1) more than 10 IB points in total within season, more IB points are special than are from regular debate.

Is this aimed at a particular audience - e.g. new debaters, experienced debaters, judges or coaches? Cross-engaged debaters.

Implementation progress

• achievement named and described
• achievement criteria translated to SQL
• tests for columns added in achievements.yml
• model reference added to union_relations in final__all_achievements.sql
• achievement image generated and placed in frontend/public/achievement_backgrounds/