Add D1 export prompt message for unavailability

[lambrospetrou]

Fixes #[CFSQL-1608].

Add a confirmation prompt that the database will be unavailable to queries during the export.

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• Tests
  • Tests included/updated
  • Automated tests not possible - manual testing has been completed as follows:
  • Additional testing not necessary because:
• Public documentation
  • Cloudflare docs PR(s):
  • Documentation not necessary because: no feature change

A picture of a cute animal (not mandatory, but encouraged)

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[changeset-bot]

🦋 Changeset detected

Latest commit: 5125cef

The changes in this PR will be included in the next version bump.

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[workers-devprod]

Codeowners approval required for this PR:

• ✅ @cloudflare/d1
• ✅ @cloudflare/wrangler

Show detailed file reviewers

[ask-bonk]

Good. The pattern is consistent with d1/delete.ts. The implementation looks solid. Let me review the overall quality:

1. Implementation (export.ts): Adds skip-confirmation flag (consistent with delete.ts), gates the confirm() prompt behind !skipConfirmation, and cleanly exits with a log message on rejection. The confirm function's default fallbackValue: true means non-interactive/CI contexts auto-approve, so existing non-TTY tests (like the "should handle remote" test at line 117) continue to work without changes.

2. Tests (export.test.ts): Three new tests covering:

   • Confirmation accepted (interactive, prompt approved)
   • Confirmation rejected (interactive, prompt denied)
   • --skip-confirmation flag bypass

3. Missing changeset: The changeset bot flagged this. Per repo rules, this is a user-facing change (new prompt + new flag) and needs a changeset.

The code looks correct and follows established patterns. The only concern is the missing changeset, but that's a process item, not a code issue.

LGTM

github run

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commit: 5125cef

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 2 additional findings.

[github-actions]

✅ All changesets look good

[workers-devprod]

Codeowners reviews satisfied