fix daily scan

[ezhang6811]

Issue #, if available:

Description of changes:
fix daily scan schedule run rate to every 6 hours as expected: cron: '0 */6 * * *'

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 67.07%. Comparing base (09e6487) to head (1f41f09).
⚠️ Report is 512 commits behind head on main.
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Additional details and impacted files

@@              Coverage Diff              @@
##               main    #1241       +/-   ##
=============================================
- Coverage     85.71%   67.07%   -18.64%     
- Complexity       19      525      +506     
=============================================
  Files             3       54       +51     
  Lines            49     2694     +2645     
  Branches          5      376      +371     
=============================================
+ Hits             42     1807     +1765     
- Misses            3      750      +747     
- Partials          4      137      +133     

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