[INLONG-12069][Audit] Fill with zero when there is no data for a given the API of day (#12070)

[INLONG-12069][Audit] Fill with zero when there is no data for a given the API of day (#12070)

Author: doleyzi

inlong-audit/audit-service/src/main/java/org/apache/inlong/audit/service/cache/DayCache.java

@@ -144,6 +144,10 @@ public List<StatData> getData(String startTime, String endTime, String inlongGro
             LOGGER.error("Query has exception! ", exception);
         }
 
+        if (result.isEmpty()) {
+            result.add(new StatData(startTime, inlongGroupId, inlongStreamId, auditId));
+        }
+
         return WILDCARD_STREAM_ID.equals(inlongStreamId)
                 ? AuditUtils.aggregateStatData(result, inlongStreamId)
                 : result;