[INLONG-12067][Audit] Optimize the auditing data statistics by day (#12068)

Co-authored-by: doleyzi <doleyzi@tencent.com>

Author: doleyzi

inlong-audit/audit-service/src/main/java/org/apache/inlong/audit/service/source/JdbcSource.java

@@ -93,11 +93,15 @@ public void start() {
         init();
         int statInterval = Configuration.getInstance().get(KEY_SOURCE_DB_STAT_INTERVAL,
                 DEFAULT_SOURCE_DB_STAT_INTERVAL);
+
+        int offset = Configuration.getInstance().get(KEY_STAT_BACK_INITIAL_OFFSET,
+                DEFAULT_STAT_BACK_INITIAL_OFFSET);
+
         if (sourceConfig.getAuditCycle() == DAY) {
             statInterval = HOUR.getValue();
+            offset = 0;
         }
-        int offset = Configuration.getInstance().get(KEY_STAT_BACK_INITIAL_OFFSET,
-                DEFAULT_STAT_BACK_INITIAL_OFFSET);
+
         for (int statBackTime = 0; statBackTime < sourceConfig.getStatBackTimes(); statBackTime++) {
             ScheduledExecutorService timer =
                     statTimers.computeIfAbsent(statBackTime, k -> Executors.newSingleThreadScheduledExecutor());