feat: add Debian package building to CI pipeline and local build

Support DEB packaging alongside RPM for Debian trixie (13/stable),
forky (14/testing), Ubuntu noble (24.04 LTS), and plucky (25.04).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

scripts/publish-deb.sh

@@ -0,0 +1,70 @@
+#!/bin/bash
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+PROJECT_ROOT="$(dirname "$SCRIPT_DIR")"
+cd "$PROJECT_ROOT"
+
+# Load .env if present
+if [ -f .env ]; then
+  set -a; source .env; set +a
+fi
+
+GITEA_URL="${GITEA_URL:-http://10.0.0.194:3012}"
+GITEA_OWNER="${GITEA_OWNER:-michal}"
+GITEA_REPO="${GITEA_REPO:-mcpctl}"
+
+if [ -z "$GITEA_TOKEN" ]; then
+  echo "Error: GITEA_TOKEN not set. Add it to .env or export it."
+  exit 1
+fi
+
+DEB_FILE=$(ls dist/mcpctl*.deb 2>/dev/null | head -1)
+if [ -z "$DEB_FILE" ]; then
+  echo "Error: No DEB found in dist/. Run scripts/build-deb.sh first."
+  exit 1
+fi
+
+# Extract version from the deb filename (e.g. mcpctl_0.0.1_amd64.deb)
+DEB_VERSION=$(dpkg-deb --field "$DEB_FILE" Version 2>/dev/null || echo "unknown")
+
+echo "==> Publishing $DEB_FILE (version $DEB_VERSION) to ${GITEA_URL}..."
+
+# Gitea Debian registry: PUT /api/packages/{owner}/debian/pool/{distribution}/{component}/upload
+# We publish to each supported distribution.
+# Debian: trixie (13/stable), forky (14/testing)
+# Ubuntu: noble (24.04 LTS), plucky (25.04)
+DISTRIBUTIONS="trixie forky noble plucky"
+
+for DIST in $DISTRIBUTIONS; do
+  echo "  -> $DIST..."
+  HTTP_CODE=$(curl -s -o /tmp/deb-upload-$DIST.out -w "%{http_code}" \
+    -X PUT \
+    -H "Authorization: token ${GITEA_TOKEN}" \
+    --upload-file "$DEB_FILE" \
+    "${GITEA_URL}/api/packages/${GITEA_OWNER}/debian/pool/${DIST}/main/upload")
+
+  if [ "$HTTP_CODE" = "201" ] || [ "$HTTP_CODE" = "200" ]; then
+    echo "     Published to $DIST"
+  elif [ "$HTTP_CODE" = "409" ]; then
+    echo "     Already exists in $DIST (skipping)"
+  else
+    echo "     WARNING: Upload to $DIST returned HTTP $HTTP_CODE"
+    cat /tmp/deb-upload-$DIST.out 2>/dev/null || true
+    echo ""
+  fi
+  rm -f /tmp/deb-upload-$DIST.out
+done
+
+echo ""
+echo "==> Published successfully!"
+
+# Ensure package is linked to the repository
+source "$SCRIPT_DIR/link-package.sh"
+link_package "debian" "mcpctl"
+
+echo ""
+echo "Install with:"
+echo "  echo \"deb ${GITEA_URL}/api/packages/${GITEA_OWNER}/debian trixie main\" | sudo tee /etc/apt/sources.list.d/mcpctl.list"
+echo "  curl -fsSL ${GITEA_URL}/api/packages/${GITEA_OWNER}/debian/repository.key | sudo gpg --dearmor -o /etc/apt/keyrings/mcpctl.gpg"
+echo "  sudo apt update && sudo apt install mcpctl"