feat(netlify): use new `durable` cache-control directive for `isr` rule

[serhalp]

🔗 Linked issue

N/A - discussed on Discord

❓ Type of change

• [ ] 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• [ ] 🐞 Bug fix (a non-breaking change that fixes an issue)
• [x] 👌 Enhancement (improving an existing functionality like performance)
• [ ] ✨ New feature (a non-breaking change that adds functionality)
• [ ] 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• [ ] ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

This is a follow-up to https://github.com/unjs/nitro/pull/2406.

See https://docs.netlify.com/platform/caching/#durable-directive. (This link should go live a bit later today!)

With this change, responses from isr routes will be propagated to the global edge network rather than be local to the CDN node that rendered and served it. This will improve performance and reduce serverless function invocations, in various scenarios.

This won't immediately have any effect since we're gradually rolling out the feature on the platform, but by the time nitro v3 (and frameworks that use it, like nuxt v4) are released it should be fully rolled out.

📝 Checklist

• [x] I have linked an issue or discussion.
• [ ] I have updated the documentation accordingly.

[pi0]

So you mind to rebase against v2 branch? 🙏 (rebased to v2, main branch will get it too: 859de2d63bfd6d0670248d1348dbc5ef46a11bdc)