Upgrade to Node 24 and add min-release-age

[judeallred]

Summary

• Upgrades Node.js requirement to 24.14.1+ (active LTS)
• Adds min-release-age=1 to .npmrc, telling npm to only resolve package versions published more than 1 day ago
• Supply-chain-attack mitigation: malicious packages are typically flagged within hours, so a 1-day quarantine avoids installing freshly-published compromised versions
• Node 24 ships npm 11.10+, which is required for the min-release-age feature

Test plan

• CI passes with Node 24
• npm install works correctly
• npm ci works correctly
• Application builds and runs successfully

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