chore(content-distribution): support newspack_log

[miguelpeixe]

Support newspack_log so incoming post errors are logged to Newspack's log infrastructure.

Testing

1. Make sure you have Newspack manager configured
2. Add the following to line 342 of includes/content-distribution/class-incoming-post.php:

$term = new WP_Error( 'test_error',  'Test error' );

3. On the same file, add the following to line 312:

$attachment_id = new WP_Error( 'test_error', 'Test error' );

4. Distribute a post with a featured image and categories/tags
5. Sync via CLI: wp newspack-network sync-all
6. Visit logstash and confirm your error is logged with appropriate error code and data

[leogermani]

👍

[github-actions]

Hey @miguelpeixe, good job getting this PR merged! 🎉

Now, the needs-changelog label has been added to it.

Please check if this PR needs to be included in the "Upcoming Changes" and "Release Notes" doc. If it doesn't, simply remove the label.

If it does, please add an entry to our shared document, with screenshots and testing instructions if applicable, then remove the label.

Thank you! ❤️

[matticbot]

🎉 This PR is included in version 2.5.0-alpha.1 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀