drop review_plans.verified column and all its references

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

server/db/index.ts

@@ -78,6 +78,7 @@ function migrate(db: Database): void {
 	// signal would come from our own ffprobe, not from a Jellyfin webhook.
 	// RENAME COLUMN preserves values; both alters are no-ops on fresh DBs.
 	alter("ALTER TABLE review_plans RENAME COLUMN webhook_verified TO verified");
+	alter("ALTER TABLE review_plans DROP COLUMN verified");
 }
 
 function seedDefaults(db: Database): void {