Never cache the interactive API docs (/ and /docs.json)

[Robbie1977]

What changed

vfbquery ≥ 1.22.42 (VirtualFlyBrain/VFBquery#96) serves interactive API documentation at its root and a machine-readable catalogue at /docs.json, both generated in-memory from the running package version. Behind this cache they would be stored under CACHE_STALE_TIME, so after every vfbquery upgrade the docs would keep naming — and documenting — the previous release for up to a month.

A $request_uri map marks the two paths and feeds proxy_cache_bypass + proxy_no_cache, so they are always fetched fresh while every other path keeps the existing cache behaviour. Both responses are tiny and computed in-memory upstream, so the bypass costs nothing.

Why

Without it, the docs page at https://v3-cached.virtualflybrain.org/ would go stale on the first upgrade after it appears.

How to test

Rendered the template through the entrypoint's own envsubst set and ran nginx -t (clean), then ran the config in front of a live vfbquery: / and /docs.json answer X-Cache-Status: BYPASS on every request, /get_term_info still goes MISS then HIT. test/ip-maps-test.sh passes; test/cache-sync-test.sh fails identically on the base branch in this environment (rsync/find variance), untouched by this change.

Follow-ups left

None in this repo — the page appears once the vfbquery release is deployed as the upstream.