fix: Improve Hashable conformance of OCKAnyEvent

[cbaker6]

Continuation of #28

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 205 lines in your changes missing coverage. Please review.

Project coverage is 5.16%. Comparing base (4d0fcc6) to head (f8549f9).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...tEssentials/Extensions/OCKAnyEvent+Equatable.swift	0.00%	65 Missing ⚠️
...itEssentials/Extensions/OCKAnyEvent+Hashable.swift	0.00%	24 Missing ⚠️
...sentials/Extensions/OCKOutcomeValue+Hashable.swift	0.00%	23 Missing ⚠️
...tials/Extensions/OCKScheduleElement+Hashable.swift	0.00%	16 Missing ⚠️
...reKitEssentials/Extensions/OCKStore+Hashable.swift	0.00%	13 Missing ⚠️
...s/Extensions/CareStoreFetchedResult+Hashable.swift	0.00%	11 Missing ⚠️
...ources/CareKitEssentials/Extensions/OCKStore.swift	0.00%	10 Missing ⚠️
...entials/Extensions/OCKBiologicalSex+Hashable.swift	0.00%	9 Missing ⚠️
...Essentials/Cards/Shared/CareKitEssentialView.swift	0.00%	6 Missing ⚠️
...entials/Extensions/OCKScheduleEvent+Hashable.swift	0.00%	6 Missing ⚠️
... and 9 more

Additional details and impacted files

@@           Coverage Diff            @@
##            main     #29      +/-   ##
========================================
- Coverage   5.64%   5.16%   -0.48%     
========================================
  Files         48      61      +13     
  Lines       2481    2711     +230     
========================================
  Hits         140     140              
- Misses      2341    2571     +230     

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