refactor(pulse-scheduler): improve SubscriptionParams validation #2594
  Add this suggestion to a batch that can be applied as a single commit.
  This suggestion is invalid because no changes were made to the code.
  Suggestions cannot be applied while the pull request is closed.
  Suggestions cannot be applied while viewing a subset of changes.
  Only one suggestion per line can be applied in a batch.
  Add this suggestion to a batch that can be applied as a single commit.
  Applying suggestions on deleted lines is not supported.
  You must change the existing code in this line in order to create a valid suggestion.
  Outdated suggestions cannot be applied.
  This suggestion has been applied or marked resolved.
  Suggestions cannot be applied from pending reviews.
  Suggestions cannot be applied on multi-line comments.
  Suggestions cannot be applied while the pull request is queued to merge.
  Suggestion cannot be applied right now. Please check back later.
  
    
  
    
Summary & Rationale
_validateAndPrepareSubscriptionParamshelper function.heartbeatSecondsanddeviationThresholdBpsare non-zero when those UpdateCriteria are enabled, since those would evaluate to always-true conditions.minPublishTimeis clamped to zero to avoid integer underflow. This should be unlikely sinceblock.timestampwill be a high number, but it's potentially possible in a new network.How has this been tested?