Fix migration: drop RoundTemplate before RoundType enum

RoundTemplate table depends on RoundType enum, must be dropped first.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

prisma/migrations/20260213000000_add_pipeline_stage_system/migration.sql

@@ -281,7 +281,8 @@ ALTER TABLE "Message" DROP CONSTRAINT IF EXISTS "Message_roundId_fkey";
 -- Make TaggingJob.roundId nullable
 DO $$ BEGIN ALTER TABLE "TaggingJob" ALTER COLUMN "roundId" DROP NOT NULL; EXCEPTION WHEN others THEN NULL; END $$;
 
--- Drop Round table and its enums (model retired in Phase 6)
+-- Drop Round and RoundTemplate tables and their enums (models retired in Phase 6)
+DROP TABLE IF EXISTS "RoundTemplate" CASCADE;
 DROP TABLE IF EXISTS "Round" CASCADE;
 DROP TYPE IF EXISTS "RoundStatus";
 DROP TYPE IF EXISTS "RoundType";