chore: raise minimum Node.js to 22.13.0 in examples

[intech]

Summary

Aligns examples with the framework's new minimum runtime of Node.js 22.13.0. Node.js 20 reached end-of-life on 2026-04-30.

Changes

• engines.node → >=22.13.0 for examples that declared a lower version (basic-service-node, basic-service-tsx, cross-runtime-test, performance-test-server, with-custom-interceptor, o11y-coroot/service).
• README requirements and the Node.js badge updated to Node.js 22+.

Examples already pinned to 25.2.0 (native .ts execution) are left unchanged.

Related

Aligns with the runtime bump in Connectum-Framework/connectum#129.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: a2bd749a-366f-46e2-bd65-00e9752b296e

📥 Commits

Reviewing files that changed from the base of the PR and between 52e5944 and afa4b20.

📒 Files selected for processing (10)

• README.md
• basic-service-bun/README.md
• basic-service-node/README.md
• basic-service-node/package.json
• basic-service-tsx/README.md
• basic-service-tsx/package.json
• cross-runtime-test/package.json
• o11y-coroot/service/package.json
• performance-test-server/package.json
• with-custom-interceptor/package.json

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/require-node-22

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