feat: Add more context on data storage locations and API endpoints

[markstory]

DESCRIBE YOUR PR

Give more context on how/when to use our API base domains.

Refs #11058

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PRE-MERGE CHECKLIST

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• [ ] Checked Vercel preview for correctness, including links
• [ ] PR was reviewed and approved by any necessary SMEs (subject matter experts)
• [ ] PR was reviewed and approved by a member of the Sentry docs team

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[codecov[bot]]

Bundle Report

Changes will decrease total bundle size by 15 bytes (-0.0%) :arrow_down:. This is within the configured threshold :white_check_mark:

Detailed changes

Bundle name	Size	Change
sentry-docs-server-cjs	7.37MB	6 bytes (-0.0%) :arrow_down:
sentry-docs-edge-server-array-push	333.11kB	3 bytes (-0.0%) :arrow_down:
sentry-docs-client-array-push	6.44MB	6 bytes (-0.0%) :arrow_down: