added SumDuplicatePolicy

[CodeMonkeyKevin]

Added support for sum duplicate policy. https://redis.io/docs/data-types/timeseries/configuration/#duplicate_policy

[sonatype-lift]

Sonatype Lift is retiring

Sonatype Lift will be retiring on Sep 12, 2023, with its analysis stopping on Aug 12, 2023. We understand that this news may come as a disappointment, and Sonatype is committed to helping you transition off it seamlessly. If you’d like to retain your data, please export your issues from the web console.
We are extremely grateful and thank you for your support over the years.

📖 Read about the impacts and timeline

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (9578098) 82.74% compared to head (0dfe6f1) 82.74%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #163   +/-   ##
=======================================
  Coverage   82.74%   82.74%           
=======================================
  Files           7        7           
  Lines         591      591           
=======================================
  Hits          489      489           
  Misses         59       59           
  Partials       43       43           

Files Changed	Coverage Δ
common.go	89.74% <ø> (ø)

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