fix(rpm): explicitly Provides user(cortex)/group(cortex)

dnf5 was silently rejecting neuron-0.1.3 with "Nothing to do" because
it had an unresolvable Requires. Inspection showed:

  Requires: user(cortex)               ← unversioned
  Provides: user(cortex) = <base64>    ← versioned only, no unversioned

rpm's sysusers provides-generator only emits the unversioned user()
provide when the u-line is minimal. Our sysusers.conf specifies GECOS,
home dir, and shell, which pushes the generator to versioned-only.
The matching Requires (auto-generated from %attr(,,cortex) on config
files) is unversioned, so resolution failed silently.

Explicitly declare Provides: user(cortex) and Provides: group(cortex)
to guarantee the unversioned forms exist. group(cortex) was already
emitted unversioned but adding it for symmetry and to protect against
future generator changes.

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

cortex.spec

@@ -22,6 +22,12 @@ BuildRequires:  systemd-rpm-macros
 Requires(pre):  shadow-utils
 Requires:       systemd
 
+# rpm's sysusers provides-generator only emits versioned user(cortex) when
+# the u-line has GECOS/home/shell fields. %attr(,,cortex) in %files emits
+# an unversioned Requires: user(cortex), so we provide it explicitly.
+Provides:       user(cortex)
+Provides:       group(cortex)
+
 %description
 Cortex is a Rust reverse-proxy that sits in front of multiple inference
 nodes (via neuron daemons) and presents a unified OpenAI and Anthropic

neuron.spec

@@ -22,6 +22,12 @@ BuildRequires:  systemd-rpm-macros
 Requires(pre):  shadow-utils
 Requires:       systemd
 
+# rpm's sysusers provides-generator only emits versioned user(cortex) when
+# the u-line has GECOS/home/shell fields. %attr(,,cortex) in %files emits
+# an unversioned Requires: user(cortex), so we provide it explicitly.
+Provides:       user(cortex)
+Provides:       group(cortex)
+
 %description
 Neuron is a per-node daemon for cortex inference clusters. It discovers
 local GPU hardware via nvidia-smi, manages inference harnesses (mistral.rs,