wrap last price rebuild in transaction

rebuild/rebuild_lastprice.ms.sql

@@ -2,6 +2,10 @@ CREATE OR ALTER PROCEDURE pricing.rebuild_lastprice
 AS
 BEGIN
     SET NOCOUNT ON;
+    SET XACT_ABORT ON;          -- auto-rollback on most errors
+
+    BEGIN TRY
+    BEGIN TRAN;                 -- start transaction
 --------------------------------------------------------------------------------
 -- Reset target tables
 --------------------------------------------------------------------------------
@@ -247,4 +251,25 @@ SELECT
 FROM flag_json f
 FULL OUTER JOIN seg_json s
     ON f.customer = s.customer AND f.partgroup = s.partgroup;
+
+--------------------------------------------------------------------------------
+-- Commit if everything succeeded
+--------------------------------------------------------------------------------
+COMMIT TRAN;
+END TRY
+BEGIN CATCH
+    -- Ensure transaction is rolled back
+    IF XACT_STATE() <> 0
+    BEGIN
+        ROLLBACK TRAN;
+    END
+
+    -- Optional: cleanup temp table (temp table persists for session until proc end,
+    -- but explicit drop is helpful if you reuse names or want to free resources)
+    IF OBJECT_ID('tempdb..#flagged') IS NOT NULL
+        DROP TABLE #flagged;
+
+    -- Rethrow the original error to the caller
+    THROW;
+END CATCH;
 END;