Maintenance release. The library API and every indicator are unchanged from
`0.9.4`; the only change that ships to users is the R package's build script.
### What's in 0.9.5
- **R package: retry the C ABI download** (`bindings/r/configure[.win]`). A freshly
cut release can briefly 404 while assets propagate; the download is now retried
with a ~2 min backoff instead of failing with `cannot open URL … 404`. Landed in
#328; ships to r-universe / source installs with this release.
- The rest of #328 — CI/release-pipeline hardening (R/NuGet dependency caching,
job timeouts 20→30 / release 45, network-install retries, wasm-publish cache) —
is infrastructure and does not affect the published artifacts, but makes this
release's own pipeline more robust.
Pure version-string bump on top — `bump_version.py` touched 19 files (Cargo +
Lock, pyproject, node package.json/locks + 6 platform stubs, pom + csproj +
DESCRIPTION, SECURITY, CHANGELOG `[0.9.5]` + compare URLs). `cargo fmt` clean.
Tag/publish waits for explicit GO (irreversible publish to crates.io / PyPI /
npm / NuGet / Maven / Go / r-universe).
