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unpublished Arch build was staged on hertz.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.

arch/reauktion-home-ca/PKGBUILD

@@ -0,0 +1,20 @@
+# Maintainer: Markus Fritsche <mfritsche@reauktion.de>
+# Trust anchor for the private reauktion.de Home CA (internal *.fritz.box
+# HTTPS). No upstream project — PKI material generated once on hertz
+# (/opt/herding/pki/), the cert is committed alongside this PKGBUILD.
+
+pkgname=reauktion-home-ca
+pkgver=20260716
+pkgrel=1
+pkgdesc="reauktion.de Home CA trust anchor for internal *.fritz.box HTTPS"
+arch=('any')
+url="https://git.reauktion.de/marfrit/marfrit-packages"
+license=('custom')
+depends=('ca-certificates-utils')
+source=('reauktion-home-ca.crt')
+sha256sums=('838fdb30d06ecbc95dabcb545920c03535527282e0e602598659e1de6de71f4c')
+
+package() {
+    install -Dm644 "${srcdir}/reauktion-home-ca.crt" \
+        "${pkgdir}/etc/ca-certificates/trust-source/anchors/reauktion-home-ca.crt"
+}

arch/reauktion-home-ca/reauktion-home-ca.crt

@@ -0,0 +1,33 @@
+-----BEGIN CERTIFICATE-----
+MIIFsTCCA5mgAwIBAgIUTAWmENkKSdBtjEqN55mD2S96BbMwDQYJKoZIhvcNAQEL
+BQAwQjEVMBMGA1UECgwMcmVhdWt0aW9uLmRlMSkwJwYDVQQDDCByZWF1a3Rpb24u
+ZGUgSG9tZSBDQSAoZnJpdHouYm94KTAeFw0yNjA3MTYyMTMzMjZaFw00NjA3MTEy
+MTMzMjZaMEIxFTATBgNVBAoMDHJlYXVrdGlvbi5kZTEpMCcGA1UEAwwgcmVhdWt0
+aW9uLmRlIEhvbWUgQ0EgKGZyaXR6LmJveCkwggIiMA0GCSqGSIb3DQEBAQUAA4IC
+DwAwggIKAoICAQCoXQg4BEvZ7PDZMvnRJtESFBPtWsdNFQz+YT1Z/mhWnNyAgfkY
+AQ5f9yzegyDrDdnm/nzv6h1Zpss+S6TE29lnLGtXaMnkNsLpdvnIi8j0Wgi2+DkA
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+4EPlLvd2nNKeF3u0qCn+2t7TmIK9dpi4gVmxhnCRlD1SLDfwnznMiDydtZJr/Kh7
+rjKgTCBAulfS9N4RQ0kyFM9hPF2KNYu8Ef6DRb3wysN1W0ozs+sdYQA15hczEFDu
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+o4GeMIGbMB8GA1UdIwQYMBaAFOT/M0xih1hOVqUu1dujtbAmfEjZMA8GA1UdEwEB
+/wQFMAMBAf8wDgYDVR0PAQH/BAQDAgEGMB0GA1UdDgQWBBTk/zNMYodYTlalLtXb
+o7WwJnxI2TA4BgNVHR4BAf8ELjAsoCowC4IJZnJpdHouYm94MA6CDHJlYXVrdGlv
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+2BqFBRRcX026HU7a9b921VCp1D8qDa43kIi9T69Fl+pNKYb2XJYda8EpehStK/02
+BQr2Owp3QGWBly5w+cjB1E77PhFYLb4jzPe2eDDs01zoDZ/IVaf2jPWiG+dGmV2Q
+J1O7u5OacwWS4WjhWYIMG3XSbkZkCIrrJFuKNEabhYlS9GxySfDn3vovWQQsJf6n
+uoeCOI/dN08snps2XMoaMbl8TeqrityQnDKhX5k8sxvO8/IrpHt4766YBHMcwcIr
+vU1zc9Yls5vOMc5adAGGj3WloCCtzTOiDPQC952nmA+8e6Pla4u4GFvwArS+LfKG
+R7c7pN6Q61bVRhM4liQ6n9djkaGuXSfkrjcWy+JsjyesHG62TxhUNDY7kqEo8V52
+oVFxWkZClQN0f5kxeXuPV+LCby4YiDq8kTkXp8jE0OvpPx4WR4pUG/nHBOE1O0b7
+GQTHwKaJs/CtfuwfJRk7ACjwEdV8G8mQxgRJB6e+pZMGqbigqWPcPTR9tnjdbg4V
+PMS6m3J+HDRSK/22ACSisUhJIQNL
+-----END CERTIFICATE-----