[Google Enhanced Conversions] Update google enhanced conversions API version to v21

[harsh-joshi99]

Upgrading google enhanced conversions API to v21 from v19, since v19 is going to be sunset in Feb 26.

JIRA -> https://twilio-engineering.atlassian.net/browse/STRATCONN-6229

Testing

Testing Document.

Include any additional information about the testing you have completed to
ensure your changes behave as expected. For a speedy review, please check
any of the tasks you completed below during your testing.

• Added unit tests for new functionality
• Tested end-to-end using the local server
• [If destination is already live] Tested for backward compatibility of destination. Note: New required fields are a breaking change.
• [Segmenters] Tested in the staging environment
• [Segmenters] [If applicable for this change] Tested for regression with Hadron.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.97%. Comparing base (5d96b8a) to head (10cd3f0).
⚠️ Report is 17 commits behind head on main.

Additional details and impacted files

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  Coverage   79.97%   79.97%           
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  Files        1204     1204           
  Lines       22312    22312           
  Branches     4414     4414           
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  Hits        17845    17845           
  Misses       3685     3685           
  Partials      782      782           

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[Copilot]

Pull Request Overview

This PR updates the Google Enhanced Conversions destination to use Google Ads API version v21 instead of v19, as v19 is being sunset in February 2026. This is a necessary API version upgrade to maintain compatibility with Google's services.

• Updates API version references from v19 to v21 across all action files
• Updates documentation links to point to v21 API reference
• Updates test mocks to use v21 error response format

Reviewed Changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
userList/index.ts	Updated consent documentation links from v19 to v21
userList/generated-types.ts	Updated TypeScript interface comments with v21 API links
uploadClickConversion2/index.ts	Updated consent documentation links from v19 to v21
uploadClickConversion2/generated-types.ts	Updated TypeScript interface comments with v21 API links
uploadClickConversion/index.ts	Updated consent documentation links from v19 to v21
uploadClickConversion/generated-types.ts	Updated TypeScript interface comments with v21 API links
uploadCallConversion2/index.ts	Updated consent documentation links from v19 to v21
uploadCallConversion2/generated-types.ts	Updated TypeScript interface comments with v21 API links
uploadCallConversion/index.ts	Updated consent documentation links from v19 to v21
uploadCallConversion/generated-types.ts	Updated TypeScript interface comments with v21 API links
functions.ts	Updated canary API version and error handling documentation link to v21
tests/userList.test.ts	Updated test mocks to use v21 error response format
tests/functions.test.ts	Updated test API endpoint to use v21

[abhandage]

Are we going to release this at once or with feature flag like we did with first party dv360? cc: @varadarajan-tw

[harsh-joshi99]

Are we going to release this at once or with feature flag like we did with first party dv360? cc: @varadarajan-tw

With feature flag. It's already setup for this destination. https://github.com/segmentio/action-destinations/blob/main/packages/destination-actions/src/destinations/google-enhanced-conversions/functions.ts#L222

[joe-ayoub-segment]

Hi @harsh-joshi99 - PR deployed