Add a query for finding most recent appearance by caster

sql/queries.sql

@@ -214,6 +214,16 @@ SELECT DATE(jst) AS dt,
 HAVING c > 1
  ORDER BY dt DESC;
 
+-- Caster's Last Appearance
+SELECT c.n AS name,
+       MAX(s.jst) AS last_appearance,
+       JULIANDAY(DATETIME('now', '+09:00')) - JULIANDAY(MAX(s.jst)) AS days_since
+  FROM schedule s
+       JOIN caster c ON c.id = s.caster_id
+ WHERE s.jst < REPLACE(DATETIME('now', '+09:00'), ' ', 'T')
+ GROUP BY c.n
+ ORDER BY last_appearance DESC;
+
 -- MANUAL FIXES
 
 -- copy matsu's cancelled coffee time to cancellation table