wrap rebuild in a proc

rebuild/rebuild_lastprice.ms.sql

@@ -1,3 +1,7 @@
+CREATE OR ALTER PROCEDURE pricing.rebuild_lastprice
+AS
+BEGIN
+	SET NOCOUNT ON;
 --------------------------------------------------------------------------------
 -- Reset target tables
 --------------------------------------------------------------------------------
@@ -243,3 +247,4 @@ SELECT
 FROM flag_json f
 FULL OUTER JOIN seg_json s
     ON f.customer = s.customer AND f.partgroup = s.partgroup;
+END;