feat: customerio segment onboard

[shrouti1507]

What are the changes introduced in this PR?

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What is the related Linear task?

Resolves INT-2393

Please explain the objectives of your changes below

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Any changes to existing capabilities/behaviour, mention the reason & what are the changes ?

N/A

Any new dependencies introduced with this change?

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Any new generic utility introduced or modified. Please explain the changes.

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Any technical or performance related pointers to consider with the change?

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@coderabbitai review

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Developer checklist

• [ ] My code follows the style guidelines of this project

• [ ] No breaking changes are being introduced.

• [ ] All related docs linked with the PR?

• [ ] All changes manually tested?

• [ ] Any documentation changes needed with this change?

• [ ] Is the PR limited to 10 file changes?

• [ ] Is the PR limited to one linear task?

• [ ] Are relevant unit and component test-cases added in new readability format?

Reviewer checklist

• [ ] Is the type of change in the PR title appropriate as per the changes?

• [ ] Verified that there are no credentials or confidential data exposed with the changes.