feat(klaviyo): add email regex validation to addProfileToList

[AnkitSegment]

Summary

• Adds email regex validation (/^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/) to the Klaviyo addProfileToList action
• Validates email in both single perform (throws PayloadValidationError) and batch performBatch (returns PAYLOAD_VALIDATION_FAILED in multi-status) paths
• Invalid emails are filtered out before sending to Klaviyo's bulk import API, preventing unnecessary API calls

Test plan

• Unit test: invalid email with single-char TLD rejected in single perform path
• Unit test: batch filters out invalid emails and only sends valid profiles to API
• Existing tests continue to pass (valid emails, phone numbers, external IDs)

🤖 Generated with Claude Code

[Copilot]

Pull request overview

This PR tightens input validation for the Klaviyo addProfileToList action by adding a stricter email regex check (beyond the existing JSON-schema format: 'email'), and applying that validation consistently in both single-event and batched execution paths to prevent sending obviously invalid emails to Klaviyo.

Changes:

• Added a shared validateEmail helper and batch-path error mapping for invalid emails.
• Added single perform validation that throws PayloadValidationError when the email fails the regex.
• Added unit tests covering single-perform invalid TLD and batch filtering behavior.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
packages/destination-actions/src/destinations/klaviyo/functions.ts	Adds email regex + validation helper and integrates it into batch payload validation.
packages/destination-actions/src/destinations/klaviyo/addProfileToList/index.ts	Applies email validation in the single perform path and wires in the helper import.
packages/destination-actions/src/destinations/klaviyo/addProfileToList/tests/index.test.ts	Adds tests for invalid email rejection and batch filtering.

Comments suppressed due to low confidence (1)

packages/destination-actions/src/destinations/klaviyo/addProfileToList/index.ts:75

• This PayloadValidationError includes the raw email address in the error message. Emails are PII and may be surfaced in logs or customer-visible error surfaces; consider using a generic message (and ideally reusing the same message as the batch-path INVALID_EMAIL_ERROR) to avoid echoing user data.

    if (!validateEmail(email)) {
      throw new PayloadValidationError(`${email} is not a valid email address.`)
    }