fix(payment-square): validate refund amount money

[aiirvizionz]

Summary

• validate Square refund amounts and currencies before calling the API
• send refund amount_money as a normalized { amount, currency } object instead of passing raw config
• add coverage for valid refund payloads and invalid refund amounts

Verification

• vitest run packages/targets/payment-square/src/index.test.ts (8 passed)
• tsc -p packages/targets/payment-square/tsconfig.json --noEmit
• git diff --check

Note: running through pnpm in this workspace currently triggers an unrelated lockfile policy failure for @profullstack/autoblog@0.4.0 missing tarball integrity, so I ran the local Vitest and TypeScript binaries directly.

[Copilot]

Pull request overview

This PR improves the Square payment target’s refund command by validating refund amount_money inputs before calling Square and ensuring the refund payload matches Square’s expected Money shape.

Changes:

• Validate refund amount as a positive integer and normalize currency to a 3-letter uppercase ISO code.
• Send amount_money as { amount, currency } for refunds (consistent with create).
• Add Vitest coverage for a valid refund payload and for rejecting invalid refund amounts before any API call.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
packages/targets/payment-square/src/index.ts	Adds refund amount/currency validation and normalizes amount_money payload.
packages/targets/payment-square/src/index.test.ts	Adds tests covering validated refund payloads and invalid refund amount rejection.

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[github-actions]

🤖 Auto-rebase: The branch was rebased successfully locally but could not be pushed to the fork. Please enable 'Allow edits from maintainers' in the PR settings, or rebase manually: git fetch upstream master && git rebase upstream/master.