Ensure cmi.interactions.n.id is unique (fixes #234)

[chris-steele]

https://github.com/adaptlearning/adapt-contrib-spoor/issues/234

Fix

• Ensure cmi.interactions.n.id is unique

[chris-steele]

@joe-allen-89 would you mind doing the honours?

[github-actions[bot]]

:tada: This PR is included in version 5.2.2 :tada:

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