ci: add RPM packaging for cortex and neuron

- cortex.spec: gateway binary, cortex.service systemd unit,
  cortex.toml + models.toml config files
- neuron.spec: neuron binary, neuron.service systemd unit,
  neuron.toml config file
- Parallel CI: srpm-cortex and srpm-neuron jobs build SRPMs
  concurrently, then publish to separate COPR repos
  (helexa/cortex and helexa/neuron)
- Shared cortex user/group across both packages
- Example configs: cortex.example.toml, neuron.example.toml,
  models.example.toml

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

neuron.spec

@@ -0,0 +1,69 @@
+Name:           neuron
+Version:        0.1.0
+Release:        1%{?dist}
+Summary:        Per-node GPU discovery and harness management daemon for cortex
+
+License:        GPL-3.0-or-later
+URL:            https://git.lair.cafe/helexa/cortex
+Source0:        %{name}-%{version}.tar.gz
+Source1:        %{name}-%{version}-vendor.tar.gz
+
+ExclusiveArch:  x86_64
+
+BuildRequires:  rust >= 1.85
+BuildRequires:  cargo
+BuildRequires:  gcc
+BuildRequires:  systemd-rpm-macros
+
+Requires(pre):  shadow-utils
+
+%description
+Neuron is a per-node daemon for cortex inference clusters. It discovers
+local GPU hardware via nvidia-smi, manages inference harnesses (mistral.rs,
+llama.cpp), and exposes an HTTP API for model lifecycle management.
+
+%prep
+%autosetup
+tar xf %{SOURCE1}
+mkdir -p .cargo
+cat > .cargo/config.toml << 'EOF'
+[source.crates-io]
+replace-with = "vendored-sources"
+
+[source.vendored-sources]
+directory = "vendor"
+EOF
+
+%build
+cargo build --release -p neuron
+
+%install
+install -Dm755 target/release/neuron %{buildroot}%{_bindir}/neuron
+install -Dm644 data/neuron.service %{buildroot}%{_unitdir}/neuron.service
+install -dm750 %{buildroot}%{_sysconfdir}/cortex
+install -Dm640 neuron.example.toml %{buildroot}%{_sysconfdir}/cortex/neuron.toml
+
+%pre
+getent group cortex >/dev/null || groupadd -r cortex
+getent passwd cortex >/dev/null || useradd -r -g cortex -d /var/lib/cortex -s /sbin/nologin cortex
+
+%post
+%systemd_post neuron.service
+
+%preun
+%systemd_preun neuron.service
+
+%postun
+%systemd_postun_with_restart neuron.service
+
+%files
+%license LICENSE
+%doc README.md
+%{_bindir}/neuron
+%{_unitdir}/neuron.service
+%dir %attr(750,root,cortex) %{_sysconfdir}/cortex
+%config(noreplace) %attr(640,root,cortex) %{_sysconfdir}/cortex/neuron.toml
+
+%changelog
+* Tue Apr 15 2026 Rob Thijssen <grenade@rob.tn> - 0.1.0-1
+- Initial package