ci: migrate copr publish to reusable action

Replace the in-repo .gitea/scripts/copr-build.sh and per-job
copr-cli configuration with the shared composite action at
https://git.lair.cafe/actions/copr-publish@v1. Behaviour is
identical — submit, watch, dump per-chroot logs — but the logic
now lives in a single place that other projects can consume.

Removes the actions/checkout step from both COPR jobs since the
build script is no longer local to this repo.

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

.gitea/workflows/ci.yml

@@ -173,13 +173,12 @@ jobs:
         with:
           name: srpm-cortex
 
-      - name: Configure copr-cli
-        run: |
-          mkdir -p ~/.config
-          echo "${{ secrets.COPR_CONFIG }}" > ~/.config/copr
-
-      - name: Submit build to COPR
-        run: copr-cli build helexa/cortex *.src.rpm
+      - name: Publish to COPR
+        uses: https://git.lair.cafe/actions/copr-publish@v1
+        with:
+          project: helexa/cortex
+          srpm: "*.src.rpm"
+          copr-config: ${{ secrets.COPR_CONFIG }}
 
   copr-neuron:
     name: Publish neuron to COPR
@@ -191,13 +190,12 @@ jobs:
         with:
           name: srpm-neuron
 
-      - name: Configure copr-cli
-        run: |
-          mkdir -p ~/.config
-          echo "${{ secrets.COPR_CONFIG }}" > ~/.config/copr
-
-      - name: Submit build to COPR
-        run: copr-cli build helexa/neuron *.src.rpm
+      - name: Publish to COPR
+        uses: https://git.lair.cafe/actions/copr-publish@v1
+        with:
+          project: helexa/neuron
+          srpm: "*.src.rpm"
+          copr-config: ${{ secrets.COPR_CONFIG }}
 
   bump-version:
     name: Bump version in source

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,