feat: Add rate limit info to events

[benjackwhite]

Changes

If the client rate limits, we send a subsequent event for ingestion warnings but that doesn't help much if you are trying to debug whats going on.

We could save the ingestion warning event but that would be added to the users event total.
or we could add some info about the current rate limit to all events so that it is possible to filter for events where the rate limit was about to kick in.

Checklist

• Tests for new code (see advice on the tests we use)
• Accounted for the impact of any changes across different browsers
• Accounted for backwards compatibility of any changes (no breaking changes in posthog-js!)

[vercel]

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Name	Status	Preview	Updated (UTC)
posthog-js	✅ Ready (Inspect)	Visit Preview	May 2, 2024 10:19am

[github-actions]

Size Change: +532 B (0%)

Total Size: 972 kB

Filename	Size	Change
dist/array.full.js	234 kB	+133 B (0%)
dist/array.js	131 kB	+133 B (0%)
dist/es.js	131 kB	+133 B (0%)
dist/module.js	131 kB	+133 B (0%)

ℹ️ View Unchanged

Filename	Size
dist/exception-autocapture.js	12.2 kB
dist/recorder-v2.js	108 kB
dist/recorder.js	108 kB
dist/surveys-module-previews.js	57.2 kB
dist/surveys.js	58.8 kB

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[pauldambra]

👍