feat: warn when distinct id invalid for replay

[pauldambra]

see https://posthog.sentry.io/issues/5544450836/?query=is%3Aunresolved+issue.priority%3A%5Bhigh%2C+medium%5D&referrer=issue-stream&statsPeriod=1h&stream_index=2

it's all one customer but we should warn in this scenario

[vercel]

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Name	Status	Preview	Updated (UTC)
posthog-js	✅ Ready (Inspect)	Visit Preview	Jun 28, 2024 11:29am

[github-actions]

Size Change: +626 B (+0.06%)

Total Size: 1.11 MB

Filename	Size	Change
dist/array.full.js	315 kB	+155 B (+0.05%)
dist/array.js	144 kB	+157 B (+0.11%)
dist/main.js	144 kB	+157 B (+0.11%)
dist/module.js	144 kB	+157 B (+0.11%)

ℹ️ View Unchanged

Filename	Size
dist/exception-autocapture.js	10.4 kB
dist/recorder-v2.js	109 kB
dist/recorder.js	109 kB
dist/surveys-preview.js	60.3 kB
dist/surveys.js	65 kB
dist/tracing-headers.js	8.26 kB
dist/web-vitals.js	5.79 kB

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[daibhin]

Should we drop the events or is that too much?

[pauldambra]

well, we're going to drop them at capture, and return a 400 (since the last couple of days changes) so I think we're ok with a log error to point someone at as well

currently this is only one customer, so even though it's pretty high volume from them, they seem to track latest version, so this will maybe help them understand what is happening 🙈