reauktion-home-ca: add Arch + Debian packaging and CI publish jobs

The package was referenced in memory as already published but never
actually existed in this repo or on packages.reauktion.de — only an
unpublished Arch build was staged on hertz. Adds real PKGBUILD +
dpkg-deb packaging (cert committed alongside, no upstream tarball)
and wires both into build.yml following the lmcp/aish dual-arch +
debian publish pattern.

.gitea/workflows/build.yml

@@ -2006,3 +2006,178 @@ jobs:
       - name: wipe secrets
         if: always()
         run: rm -f /root/.ssh/id_ed25519_hertz
+
+  # -------------------------------------------------------------------------
+  # reauktion-home-ca — trust anchor for the private reauktion.de Home CA
+  # (internal *.fritz.box HTTPS; PKI material lives on hertz:/opt/herding/pki/,
+  # see reference_fritzbox_ca memory). No upstream project: the cert is
+  # committed alongside the packaging in this repo instead of fetched.
+  # arch=any / Architecture: all — one build serves every target.
+  # -------------------------------------------------------------------------
+  reauktion-home-ca-any:
+    needs: sic-agent-debian
+    runs-on: arch-aarch64
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: skip if already published
+        id: skip-check
+        run: |
+          set -e
+          result=$(./.gitea/scripts/check-already-published.sh arch/reauktion-home-ca)
+          echo "$result" >> "$GITHUB_OUTPUT"
+          echo "decision: $result"
+
+      - name: bootstrap runner (idempotent)
+        if: steps.skip-check.outputs.skip != '1'
+        run: |
+          set -e
+          retry() { for i in 1 2 3; do "$@" && return 0; rc=$?; echo "retry $i (exit=$rc)" >&2; sleep $((i*5)); done; return 1; }
+          retry pacman -Syu --noconfirm --needed base-devel git rsync gnupg openssh sudo
+
+      - name: import signing key
+        if: steps.skip-check.outputs.skip != '1'
+        env:
+          PRIV: ${{ secrets.MARFRIT_REPO_PRIVATE_KEY }}
+          PASS: ${{ secrets.MARFRIT_REPO_PASSPHRASE }}
+        run: |
+          set -e
+          gpgconf --homedir /root/.gnupg --kill all 2>/dev/null || true
+          rm -rf /root/.gnupg /root/repo_pass
+          mkdir -m700 -p /root/.gnupg
+          printf '%s' "$PASS" > /root/repo_pass
+          chmod 600 /root/repo_pass
+          printf '%s\n' "$PRIV" | gpg --batch --import
+          echo "92D5E96D8F63C75E4116AA1FF5C8C4603D0D250C:6:" | gpg --import-ownertrust
+
+      - name: install deploy ssh key
+        if: steps.skip-check.outputs.skip != '1'
+        env:
+          KEY: ${{ secrets.MARFRIT_REPO_DEPLOY_KEY }}
+        run: |
+          mkdir -m700 -p /root/.ssh
+          printf '%s\n' "$KEY" > /root/.ssh/id_ed25519
+          chmod 600 /root/.ssh/id_ed25519
+          ssh-keyscan -t ed25519 nc.reauktion.de > /root/.ssh/known_hosts 2>/dev/null
+
+      - name: makepkg reauktion-home-ca
+        if: steps.skip-check.outputs.skip != '1'
+        run: |
+          set -e
+          rm -rf /tmp/build-reauktion-home-ca
+          cp -r arch/reauktion-home-ca /tmp/build-reauktion-home-ca
+          chown -R builder:builder /tmp/build-reauktion-home-ca
+          cd /tmp/build-reauktion-home-ca
+          sudo -u builder -H makepkg --nocheck --noconfirm --syncdeps --cleanbuild
+          ls -la *.pkg.tar.* | grep -v "\.sig$"
+
+      - name: sign reauktion-home-ca
+        if: steps.skip-check.outputs.skip != '1'
+        run: |
+          set -e
+          cd /tmp/build-reauktion-home-ca
+          for f in *.pkg.tar.xz *.pkg.tar.zst *.pkg.tar.gz; do
+            [ -f "$f" ] || continue
+            gpg --batch --pinentry-mode loopback --passphrase-file /root/repo_pass \
+                --detach-sign --yes -u 92D5E96D8F63C75E4116AA1FF5C8C4603D0D250C "$f"
+          done
+
+      - name: publish reauktion-home-ca to both arches
+        if: steps.skip-check.outputs.skip != '1'
+        run: |
+          set -e
+          retry() { for i in 1 2 3; do "$@" && return 0; rc=$?; echo "retry $i (exit=$rc)" >&2; sleep $((i*5)); done; return 1; }
+          export GNUPGHOME=/root/.gnupg
+          printf 'pinentry-mode loopback\npassphrase-file /root/repo_pass\n' > /root/.gnupg/gpg.conf
+          printf 'allow-loopback-pinentry\n' > /root/.gnupg/gpg-agent.conf
+          gpg-connect-agent reloadagent /bye
+
+          for target in aarch64 x86_64; do
+              stage="/tmp/arch-stage-$target"
+              rm -rf "$stage"; mkdir -p "$stage"; cd "$stage"
+              for f in marfrit.db.tar.gz marfrit.db.tar.gz.sig marfrit.files.tar.gz marfrit.files.tar.gz.sig; do
+                curl -sSLf "https://packages.reauktion.de/arch/$target/$f" -o "$f" || rm -f "$f"
+              done
+              cp /tmp/build-reauktion-home-ca/*.pkg.tar.* .
+              pkgs=()
+              for ext in xz zst gz; do
+                for f in *.pkg.tar.$ext; do [ -f "$f" ] && pkgs+=("$f"); done
+              done
+              if [ -f marfrit.db.tar.gz ]; then
+                for f in "${pkgs[@]}"; do
+                  name=$(echo "$f" | sed -E 's/-[0-9].*//')
+                  repo-remove --sign --key 92D5E96D8F63C75E4116AA1FF5C8C4603D0D250C \
+                    marfrit.db.tar.gz "$name" 2>/dev/null || true
+                done
+              fi
+              repo-add --new --sign --key 92D5E96D8F63C75E4116AA1FF5C8C4603D0D250C \
+                --verify marfrit.db.tar.gz "${pkgs[@]}"
+              ln -sf marfrit.db.tar.gz        marfrit.db
+              ln -sf marfrit.files.tar.gz     marfrit.files
+              ln -sf marfrit.db.tar.gz.sig    marfrit.db.sig
+              ln -sf marfrit.files.tar.gz.sig marfrit.files.sig
+              retry rsync -avL --copy-unsafe-links \
+                -e 'ssh -i /root/.ssh/id_ed25519' \
+                ./ "mfritsche@nc.reauktion.de:arch/$target/"
+          done
+
+      - name: wipe secrets
+        if: always()
+        run: rm -f /root/repo_pass /root/.ssh/id_ed25519
+
+  reauktion-home-ca-debian:
+    needs: reauktion-home-ca-any
+    runs-on: arch-aarch64
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: skip if already published
+        id: skip-check
+        run: |
+          set -e
+          result=$(./.gitea/scripts/check-already-published.sh debian/reauktion-home-ca)
+          echo "$result" >> "$GITHUB_OUTPUT"
+          echo "decision: $result"
+
+      - name: install dpkg
+        if: steps.skip-check.outputs.skip != '1'
+        run: |
+          set -e
+          retry() { for i in 1 2 3; do "$@" && return 0; rc=$?; echo "retry $i (exit=$rc)" >&2; sleep $((i*5)); done; return 1; }
+          retry pacman -Syu --noconfirm --needed dpkg openssh rsync curl
+
+      - name: install hertz deploy ssh key
+        if: steps.skip-check.outputs.skip != '1'
+        env:
+          KEY: ${{ secrets.MARFRIT_REPO_HERTZ_KEY }}
+        run: |
+          mkdir -m700 -p /root/.ssh
+          printf '%s\n' "$KEY" > /root/.ssh/id_ed25519_hertz
+          chmod 600 /root/.ssh/id_ed25519_hertz
+          ssh-keyscan -t ed25519 hertz.fritz.box >> /root/.ssh/known_hosts 2>/dev/null
+
+      - name: build reauktion-home-ca .deb
+        if: steps.skip-check.outputs.skip != '1'
+        run: |
+          set -e
+          cd debian/reauktion-home-ca
+          ./build-deb.sh
+          ls -la *.deb
+
+      - name: upload + publish to suites
+        if: steps.skip-check.outputs.skip != '1'
+        run: |
+          set -e
+          retry() { for i in 1 2 3; do "$@" && return 0; rc=$?; echo "retry $i (exit=$rc)" >&2; sleep $((i*5)); done; return 1; }
+          cd debian/reauktion-home-ca
+          DEB=$(ls reauktion-home-ca_*.deb | head -1)
+          retry rsync -av -e 'ssh -i /root/.ssh/id_ed25519_hertz' "$DEB" \
+              marfritrepo@hertz.fritz.box:
+          for suite in bookworm trixie; do
+              retry ssh -i /root/.ssh/id_ed25519_hertz marfritrepo@hertz.fritz.box \
+                  "publish-deb $suite $DEB"
+          done
+
+      - name: wipe secrets
+        if: always()
+        run: rm -f /root/.ssh/id_ed25519_hertz