feat: remove contact import onError option

[vcapretz]

Summary

• Remove onError from CreateContactImportOptions.
• Stop sending on_error in contact import create form data.
• Update contact import create test coverage for the new request payload.

Test plan

• pnpm vitest run src/contacts/imports/contact-imports.spec.ts --exclude e2e
• pnpm run typecheck (fails: existing TypeScript 6 deprecation for moduleResolution=node10 in tsconfig.json)

Made with Cursor

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Summary by cubic

Removed the onError option from contact import creation and stopped sending on_error in the form payload. Aligns the SDK with the API and removes an unsupported parameter.

• Migration
  • Remove any onError usage from CreateContactImportOptions (and related ContactImportOnError types).
  • No replacement; server default error handling is used.
  • onConflict, segments, and topics are unchanged.

^{Written for commit 306399a. Summary will update on new commits.}

[pkg-pr-new]

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commit: 306399a

[cubic-dev-ai]

No issues found across 3 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

<sub>Auto-approved: Removes an unsupported onError option from contact import creation. Changes are minimal, isolated, and align the SDK with the API.

Re-trigger cubic</sub>