[AUTO] Increment version to 2.19.4-SNAPSHOT

[opensearch-trigger-bot]

• Incremented version to 2.19.4-SNAPSHOT.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 37.67%. Comparing base (21e6b19) to head (be10887).
⚠️ Report is 1 commits behind head on 2.19.

❌ Your project status has failed because the head coverage (37.67%) is below the target coverage (75.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff            @@
##               2.19     #826   +/-   ##
=========================================
  Coverage     37.67%   37.67%           
  Complexity      135      135           
=========================================
  Files            22       22           
  Lines          1189     1189           
  Branches        109      109           
=========================================
  Hits            448      448           
  Misses          704      704           
  Partials         37       37           

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