Add DEB packaging execution block for Release 2a

- Added complete DEB packaging logic from reference script
- Uses make_rpm_ubuntu26_release2.py with Release 2a filter
- Stages workspace, runs package build, copies .deb files to packages-out
- Triggered by --run-jenkins-builder flag

Co-authored-by: Copilot <2235566219+Copilot@users.noreply.github.com>

qt6-after/qt6-migrated-legatus/new_docker_build_release2.sh

@@ -780,6 +780,69 @@ if [[ "${RUN_CTEST}" == "ON" ]] && [[ "${TESTS_ONLY}" != "ON" ]]; then
   cd ..
 fi
 
+# DEB Package Production (in-tree rpmbuild)
+if [[ "${RUN_JENKINS_BUILDER}" == "ON" ]]; then
+  log_info "=== DEB Package Production (in-tree rpmbuild) ==="
+
+  OS_VERSION=$(cat /etc/os-release | grep "^VERSION_ID=" | cut -d'"' -f2)
+  STAGE_DIR=/workspace/deb_stage
+  STAGED_SOURCE_DIR="${STAGE_DIR}"
+
+  log_info "Staging workspace to ${STAGE_DIR}"
+  rm -rf "${STAGE_DIR}"
+  mkdir -p "${STAGE_DIR}"
+  tar --exclude='./rpms' --exclude='./.git' --exclude='./build' \
+      --exclude='./deb_build_tmp' --exclude='./deb_stage' --exclude='./packages-out' \
+      --exclude='./legatus-qt6_1.0.tar.gz' \
+      -cf - -C /workspace . | tar -xf - -C "${STAGE_DIR}"
+
+  if [[ ! -f "${STAGED_SOURCE_DIR}/CMakeLists.txt" || ! -f "${STAGED_SOURCE_DIR}/rpmbuild/make_rpm_ubuntu26_release2.py" ]]; then
+    log_error "Staged source incomplete under ${STAGED_SOURCE_DIR} (CMakeLists.txt or rpmbuild/make_rpm_ubuntu26_release2.py missing)"
+    exit 1
+  fi
+
+  log_info "Running ${STAGED_SOURCE_DIR}/rpmbuild/make_rpm_ubuntu26_release2.py with:"
+  log_info "  PROJECT=${PROJECT}"
+  log_info "  OS_VERSION=${OS_VERSION}"
+  log_info "  LTS_VERSION=${LTS_VERSION}"
+  log_info "  GUEZ_MODE=${GUEZ_MODE}"
+  log_info "  BUILD_NUMBER=${BUILD_NUMBER}"
+  log_info "  BUILD_TAG=${BUILD_TAG}"
+
+  cd "${STAGED_SOURCE_DIR}/rpmbuild"
+  if python3 make_rpm_ubuntu26_release2.py -c LTS \
+      --project_name "${PROJECT}" \
+      --version "${LTS_VERSION}" \
+      --output_dir "/workspace/rpms/${PROJECT}/${OS_VERSION}/" \
+      --source_dir "${STAGED_SOURCE_DIR}" \
+      --cmake_build_flags "-DUSE_IPO=ON -DUSE_UNITY_BUILD=ON -DGUEZ_MODE=${GUEZ_MODE} -DBUILD_WLS=ON -DPostgreSQL_TYPE_INCLUDE_DIR=/usr/include/postgresql/ -DRELEASE_BUILD=ON" \
+      --build_number "${BUILD_NUMBER}" \
+      --release_scope; then
+    log_info "Package build completed successfully"
+  else
+    log_error "Package build failed (exit code: $?)"
+    exit 1
+  fi
+
+  # Copy produced DEB packages to the packages-out
+  DEST_DIR=/workspace/packages-out
+  mkdir -p "${DEST_DIR}"
+  shopt -s nullglob
+  for deb in "/workspace/rpms/${PROJECT}/${OS_VERSION}/"*.deb; do
+    base="$(basename "${deb}")"
+    if [[ -e "${DEST_DIR}/${base}" ]] &&
+       [[ "$(stat -c '%d:%i' "${deb}")" == "$(stat -c '%d:%i' "${DEST_DIR}/${base}")" ]]; then
+      continue
+    fi
+    cp -f "${deb}" "${DEST_DIR}/"
+  done
+  shopt -u nullglob
+  log_info "DEB packages available in ${DEST_DIR} (host: ${PACKAGE_OUTPUT_DIR:-unknown}):"
+  ls -lh "${DEST_DIR}/"
+else
+  log_info "Skipping DEB package production"
+fi
+
 log_info "Release 2 build completed successfully!"
 '
 )