chore: use consistent enum property names between related enums

[samayer12]

Description

Property names on Event enums are not in upper-case, unlike the property names for Operation. These two enums are related, and it aids code readability for them to match each other's format (all caps).

End to End Test:
(See Pepr Excellent Examples)

Related Issue

Relates to #1397 and #1402

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Other (security config, docs update, etc)

Checklist before merging

• Unit, Journey, E2E Tests, docs, adr added or updated as needed
• Contributor Guide Steps followed

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.55%. Comparing base (83e0d88) to head (8414f28).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1451   +/-   ##
=======================================
  Coverage   78.55%   78.55%           
=======================================
  Files          36       36           
  Lines        1716     1716           
  Branches      386      410   +24     
=======================================
  Hits         1348     1348           
+ Misses        366      339   -27     
- Partials        2       29   +27     

Files with missing lines	Coverage Δ
src/lib/capability.ts	94.90% <100.00%> (ø)
src/lib/enums.ts	100.00% <100.00%> (ø)
src/lib/filter/adjudicators.ts	100.00% <ø> (ø)
src/lib/watch-processor.ts	78.64% <100.00%> (ø)

... and 6 files with indirect coverage changes

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