[D1] Updating D1Result object to include the new fields

[Oxyjun]

Summary

1. Updating the shape of the D1Result object to include new fields.
2. Updating the example code.

Screenshots (optional)

Documentation checklist

• The documentation style guide has been adhered to.
• If a larger change - such as adding a new page- an issue has been opened in relation to any incorrect or out of date information that this PR fixes.
• Files which have changed name or location have been allocated redirects.

[windsurf-bot]

Looks good to me 🤙

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PR Change Summary

Updated the D1Result object to include additional metadata fields for improved query execution insights.

• Added new fields to the D1Result object for region and primary instance information.
• Included SQL execution duration in milliseconds for better performance tracking.
• Updated example response to reflect the new structure and values.

Modified Files

• src/content/docs/d1/worker-api/return-object.mdx

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[github-actions]

This pull request requires reviews from CODEOWNERS as it changes files that match the following patterns:

Pattern	Owners
/src/content/docs/d1/	@elithrar, @rozenmd, @vy-ton, @joshthoward, @oxyjun, @harshil1712, @cloudflare/pcx-technical-writing

[github-actions]

Preview URL: https://0f90430d.preview.developers.cloudflare.com
Preview Branch URL: https://jun-d1-meta-object-update.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/d1/worker-api/return-object/	https://jun-d1-meta-object-update.preview.developers.cloudflare.com/d1/worker-api/return-object/