[Content]: Update section on messageId to note that it is limited to 100 characters

[AndrewTSeipp]

What article on segment.com/docs is affected?

https://segment.com/docs/connections/spec/common/

What part(s) of the article would you like to see updated?

The messageId field is, as I've learned from support, limited to 100 characters.

it would be good to note this in the documentation in the link I posted above as well as on the doc about duplicate data:

https://segment.com/docs/guides/duplicate-data/

And possibly here on the section about errors on this article:

https://segment.com/docs/connections/sources/catalog/libraries/server/http-api/#errors

Additional information

No response

[github-actions]

This issue is stale because it has been open 60 days with no activity.