Enable reqwest's rustls-tls-native-roots feature for hive-forge so its
HTTP client validates against the OS/system CA store (rustls-native-certs)
in addition to the bundled webpki roots. Once the hive CA is embedded into
agent system trust stores (via the meta flake's security.pki.certificateFiles
wiring), hive-forge validates the gateway's self-signed leaf with no extra
env plumbing.
Additive: the bundled webpki roots stay enabled, so public CAs still
validate; the native store adds the hive CA. On NixOS the system store
already includes the Mozilla bundle, so the effective trust set is a
superset. Cargo unifies features across the build, so native-root loading
is enabled for every reqwest client — harmless, since it only widens the
root set.
Final piece of the self-signed agent-trust chain (host CA + gateway leaf,
then CA embedded into agent flakes, now the forge client honouring it).
1e39a6c12b