feat(webhooks): promote event endpoints to stable

[gabrielmfern]

Promotes the webhook event implementation and tests already merged into preview-headless-dashboard by #1051 onto canary for stable release as 6.24.0.

The only GA follow-up aligns WebhookEventLog.type with the public webhook event enum. This PR also bumps the package version from 6.23.0 to 6.24.0.

Linear: https://linear.app/resend/issue/DEV-1922/node-sdk-internal

Checks:

• pnpm test src/webhooks/webhooks.spec.ts
• pnpm typecheck
• pnpm lint
• pnpm build
• live Keychain-authenticated API calls through all three methods

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/resend@1083

commit: acf8f24

[cubic-dev-ai]

All reported issues were addressed across 8 files

<sub>Reply with feedback, questions, or to request a fix.

Re-trigger cubic</sub>

[cubic-dev-ai]

0 issues found across 1 file (changes from recent commits).

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

<sub>Requires human review: Adds new public webhook event listing endpoints (list/get/attempts) to the stable SDK, promoting a preview feature to a stable public API.

Re-trigger cubic</sub>

[cubic-dev-ai]

0 issues found across 1 file (changes from recent commits).

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

<sub>Requires human review: Promotes preview webhook event endpoints (list/get/attempts) to stable and adds a new segment.update method to the stable SDK, changing public contracts and requiring product/rollout sign-off.

Re-trigger cubic</sub>