fix(shadow): start queue cursor at database time

ruoyi-wcs-shadow/src/test/java/com/ruoyi/shadow/facts/SqlServerShadowFactReaderTest.java

@@ -61,6 +61,7 @@ class SqlServerShadowFactReaderTest {
                 siteIds(batch.getMaps()));
         assertEquals(3, batch.getSourceQueues().size());
         assertEquals("070502", batch.vehicle("1").getCurrentSite());
+        assertEquals(NOW.minusMillis(5_500), source.cursor.getOverlapStart());
         assertTrue(batch.getDatabaseCapturedAt().isBefore(NOW.plusSeconds(4)));
         assertEquals(1, transactions.calls);
         assertTrue(transactions.readOnly);