* feat: support for timeshift in logs
* fix: post process the timeshift function result
* fix: start and end times adjusted
* fix: only apply functions instead of entire post process
* fix: unnecessary error handling removed
* fix: apply functions for all sources
* feat: test added for timeshift
* fix: comments corrected
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Co-authored-by: Srikanth Chekuri <srikanth.chekuri92@gmail.com>
