fix(Phantombuster Node): Don't send empty objects in request

[krisn0x]

Summary

Phantombuster's API throws an error if we send argument or bonusArgument as empty objects, which happened if the user didn't provide any values for those. This fix adds validation to ensure we omit the objects entirely if they are empty.

Related Linear tickets, Github issues, and Community forum posts

https://linear.app/n8n/issue/NODE-4002/community-issue-phantombuster-node-not-filled-in-optional-fields-are
fixes #18087

Review / Merge checklist

• PR title and summary are descriptive. (conventions)
• Docs updated or follow-up ticket created.
• Tests included.
• PR Labeled with release/backport (if the PR is an urgent fix that needs to be backported)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!

[currents-bot]

✅

E2E Tests: n8n tests passed after 9m 21.5s

🟢 576 · 🔴 0 · ⚪️ 43 · 🟣 2

View Run Details

Run Details

• Project: n8n

• Groups: 2

• Framework: Playwright

• Run Status: Passed

• Commit: 58d33e8

• Spec files: 129

• Overall tests: 619

• Duration: 9m 21.5s

• Parallelization: 9

Groups

GroupId	Results	Spec Files Progress
multi-main:ui	🟢 519 · 🔴 0 · ⚪️ 43 · 🟣 2	120 / 120
multi-main:ui:isolated	🟢 57 · 🔴 0 · ⚪️ 0	9 / 9

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[RomanDavydchuk]

The fix works as expected and code looks good 🙌

Also good job on the tests, just left one small nitpick (not required to address it, only if you want to)

But I noticed that your commits are unverified, i.e. without signature, I think it's required for us to have the commit signature set up, so I think you'd need to configure it and repush your changes 😓 But once that is done, we can merge it

[RomanDavydchuk]

Nice, great that you fixed the signature as well. One last comment and we can merge it 🙌

[RomanDavydchuk]

I think this workflow file can be removed since it's no longer used in tests