- the Nitro middleware answers redirect (301/302, Location from the answer
only, same-site targets as paths as in v0.1.1) and gone (410) before the
render and the route cache, sets X-Robots-Tag, and answers 404 for a
pagination.invalid answer; other not_found answers stay with Nuxt
- resolve answers cached in an LRU (seo.resolveCacheTtl, default 60 s,
1000 entries) with in-flight de-duplication; a clear detaches loads in
flight so no answer fetched before a purge is stored after it
- the playground route-caches /blog/** (swr 300)