fix(shadow): ignore map rows without site id

ruoyi-wcs-shadow/src/main/java/com/ruoyi/shadow/facts/SqlServerShadowFactReader.java

@@ -199,7 +199,9 @@ public final class SqlServerShadowFactReader {
                 + "FROM shadow_ro.v_device_srgv ORDER BY device_id, guid";
         static final String MAP_SQL =
                 "SELECT TOP (?) guid, site_id, x, y, z, value "
-                + "FROM shadow_ro.v_wcs_srgv_map ORDER BY site_id, guid";
+                + "FROM shadow_ro.v_wcs_srgv_map "
+                + "WHERE NULLIF(LTRIM(RTRIM(CONVERT(nvarchar(256), site_id))), N'') "
+                + "IS NOT NULL ORDER BY site_id, guid";
 
         private final JdbcTemplate jdbc;
         private final Clock clock;