Rotation check schedule (Feature 20)

Register rotation_check: daily at review_time, claimed as
rotation_check:YYYY-MM-DD, it calls plan.MarkTried for yesterday.
MarkTried now emits rotation_review:{dinnerId}:{planDate} ("How was
{dinner}? Keep it in rotation?", URL /) for each Rotation check it
opens, in the same transaction. Nothing promotes a dinner to Regular.

Task: 58095ae5-ed4b-4494-b8f0-206c4c0a3f1a

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

cmd/server/main.go

@@ -204,6 +204,9 @@ func run(cfg config.Config, logger *slog.Logger) error {
 			return err
 		}
 	}
+	if err := sched.Register(planSvc.RotationCheckSchedule()); err != nil {
+		return err
+	}
 	if err := sched.Register(shopSvc.ChatAutosendSchedule()); err != nil {
 		return err
 	}