chore: Fix JSON schema strict validation error

[nickdnk]

Reason for This PR

type property is missing from metrics object.

Description of Changes

Added type property to metrics object.

License Acceptance

By submitting this pull request, I confirm that my contribution is made under
the terms of the MIT license.

PR Checklist

[Author TODO: Meet these criteria.]
[Reviewer TODO: Verify that these criteria are met. Request changes if not]

• All commits in this PR are signed (git commit -s).
• The reason for this PR is clearly provided (issue no. or explanation).
• The description of changes is clear and encompassing.
• Any required documentation changes (code and docs) are included in this PR.
• Any user-facing changes are mentioned in CHANGELOG.md.
• All added/changed functionality is tested.

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 40.06%. Comparing base (c5a93ee) to head (9e19b6e).
Report is 3 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #571   +/-   ##
=======================================
  Coverage   40.06%   40.06%           
=======================================
  Files          14       14           
  Lines         936      936           
=======================================
  Hits          375      375           
  Misses        518      518           
  Partials       43       43           

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