Add isPositive factory SDK util

[kjgbot]

Summary

• add a pure isPositive utility to factory-sdk
• export the utility from the SDK index
• cover positive, negative, and zero cases with Vitest

Validation

• npx vitest run packages/factory-sdk/src/is-positive.test.ts

[coderabbitai]

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: e587d637-cf0c-4ecf-94d1-e2ae8ee3763b

📥 Commits

Reviewing files that changed from the base of the PR and between de24cb3 and ef4f573.

📒 Files selected for processing (3)

• packages/factory-sdk/src/index.ts
• packages/factory-sdk/src/is-positive.test.ts
• packages/factory-sdk/src/is-positive.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch ar-229-is-positive

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[gemini-code-assist]

Code Review

This pull request introduces a new utility function isPositive to the factory-sdk package, which checks if a given number is greater than zero. It also includes corresponding unit tests to verify its behavior for positive numbers, negative numbers, and zero, and exports the function from the package's entry point. There are no review comments, so I have no feedback to provide.

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[kjgbot]

Closing per factory close-never-merge policy: synthetic [factory-e2e] probe PR (issue is synthetic; probe PRs are close-never-merge by policy, never merged). Manual enforcement — the daemon's auto-close no-op'd because the PR title lacks the [factory-e2e] marker (close-probe bug, fix in flight).