clarify definition of events and attachments

[imatwawana]

Clarifies the definition of attachments as not events in several places

Replicated work on Transaction Quota Mgmt on PR 5114 to unblock that

[vercel]

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Name	Status	Preview	Updated
sentry-docs	✅ Ready (Inspect)	Visit Preview	Jun 3, 2022 at 8:14PM (UTC)

[imatwawana]

Since we're still waiting on clarification from the product folks about the attachments stuff, I'm going to open a new PR for the just the changes to the manage-transaction-quota.mdx file and remove those updates from this PR. That's a separate issue and I want to get that fix in sooner than later.

[github-actions]

This pull request has gone three weeks without activity. In another week, I will close it.

But! If you comment or otherwise update it, I will reset the clock, and if you label it Status: Backlog or Status: In Progress, I will leave it alone ... forever!

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"A weed is but an unloved flower." ― Ella Wheeler Wilcox 🥀

[imatwawana]

Closing this PR. There are too many merge conflicts because of significant changes to Quota Management and Pricing docs. Many of the issues raised on this PR were resolved on other PRs and the remaining ones are resolved on #5434.