Add New Events Attributes

[alexanderbez]

Add some missing event attributes that would be helpful for upstream consumers and clients.

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• Linked to github-issue with discussion and accepted design OR link to spec that describes this work.

• Wrote tests

• Updated relevant documentation (docs/)

• Added a relevant changelog entry: clog add [section] [-t <tag>] [-m <msg>]

• Re-reviewed Files changed in the github PR explorer

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For Admin Use:

• Added appropriate labels to PR (ex. wip, ready-for-review, docs)
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• Squashed all commits, uses message "Merge pull request #XYZ: [title]" (coding standards)

[codecov]

Codecov Report

Merging #4772 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #4772      +/-   ##
==========================================
+ Coverage   53.88%   53.89%   +<.01%     
==========================================
  Files         270      270              
  Lines       17230    17231       +1     
==========================================
+ Hits         9285     9286       +1     
  Misses       7261     7261              
  Partials      684      684

[fedekunze]

minor nit. otherwise LGTM

[jackzampolin]

This is a state machine breaking and will break the testnet if we try to deploy it there.

[alexanderbez]

This is a state machine breaking and will break the testnet if we try to deploy it there.

Events are not state-machine breaking -- they're not stored in state. Events can be added/removed at will without any breaking changes technically 👍