fix(exporter): 修复ymt数据源下reseller_id_eq过滤器处理

- 不再将reseller_id_eq转换为merchant_id_in过滤条件
- 保留reseller_id_eq作为独立的WHERE子句进行过滤
- 删除零值的reseller_id_eq以避免无效查询条件
- 优化了过滤器的逻辑，避免删改遗漏问题

server/internal/exporter/sqlbuilder.go

@@ -178,17 +178,13 @@ func BuildSQLWithFields(req BuildRequest, whitelist map[string]bool) (string, []
 			delete(req.Filters, "merchant_id_eq")
 		}
 	}
-	// normalize reseller_id_eq (YMT 直连 merchant_id)
+	// reseller_id_eq (YMT): 不再转换为 merchant_id_in，保留作为单独 WHERE 条件
 	if req.Datasource == "ymt" && (req.MainTable == "order" || req.MainTable == "order_info") {
 		if v, ok := req.Filters["reseller_id_eq"]; ok {
 			if isZeroID(v) {
 				delete(req.Filters, "reseller_id_eq")
-			} else {
-				if _, has := req.Filters["merchant_id_in"]; !has {
-					req.Filters["merchant_id_in"] = []interface{}{v}
-				}
-				delete(req.Filters, "reseller_id_eq")
 			}
+			// 保留 reseller_id_eq 作为单独 WHERE 条件
 		}
 	}