fix: cache key interpolation bug

[raquelmsmith]

Problem

Tokens were being written with QuotaLimitingCaches.QUOTA_LIMITER_CACHE_KEYevents instead of the proper @posthog/quota-limits/events due to not using the value of the enum.

Changes

Makes it use the .value and also changes all the tests to use the hard-coded key so that they are actually reflective of reality.

👉 Stay up-to-date with PostHog coding conventions for a smoother review.

Does this work well for both Cloud and self-hosted?

N/A

How did you test this code?

Tests pass locally.

[sentry-io]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ TypeError: Value after * must be an iterable, not NoneType posthog.tasks.usage_report.send_report_to_billi... View Issue

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