feat: don't flatten content_ids and contents before setting in custom_data

[sandeepdsvs]

Description of the change

Description here

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Related issues

Fix #1

Checklists

Development

• Lint rules pass locally
• The code changed/added as part of this pull request has been covered with tests
• All tests related to the changed code pass in development

Code review

• This pull request has a descriptive title and information useful to a reviewer. There may be a screenshot or screencast attached
• "Ready for review" label attached to the PR and reviewers mentioned in a comment
• Changes have been reviewed by at least one other engineer
• Issue from task tracker has a link to this pull request

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (c147906) 87.13% compared to head (9fe0504) 87.13%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2790      +/-   ##
==========================================
- Coverage   87.13%   87.13%   -0.01%     
==========================================
  Files         766      766              
  Lines       28443    28447       +4     
  Branches     6655     6656       +1     
==========================================
+ Hits        24785    24788       +3     
- Misses       3321     3322       +1     
  Partials      337      337              

Files	Coverage Δ
src/v0/destinations/facebook_pixel/config.js	100.00% <100.00%> (ø)
src/v0/destinations/facebook_pixel/transform.js	97.11% <66.66%> (-0.91%)	⬇️

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[sonarqubecloud]

SonarCloud Quality Gate failed.   

1 Bug
0 Vulnerabilities
0 Security Hotspots
11 Code Smells

87.5% Coverage
1.6% Duplication

Catch issues before they fail your Quality Gate with our IDE extension SonarLint

[krishna2020]

LGTM