feat(ci-reports): publish report.tar.gz archive for offline download

Pack HTML report after publish; link archive in run index and CI log.
Add fetch-ci-report.sh helper for agent curl/extract.

[skip ci]

scripts/fetch-ci-report.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+# Download CI report archive from ci-reports server and extract for agent/offline analysis.
+# Usage: fetch-ci-report.sh <report.tar.gz URL> [out_dir]
+# Example:
+#   bash scripts/fetch-ci-report.sh \
+#     'https://ci-reports.ift.eventhub.local/EventHubFront/40/allure-ift/report.tar.gz' \
+#     ./.tmp-ci-report
+set -euo pipefail
+
+URL="${1:?report.tar.gz URL}"
+OUT="${2:-./ci-report-archive}"
+CURL=(curl -fsSL)
+if [[ "${CI_REPORTS_INSECURE:-}" == "1" ]]; then
+  CURL+=( -k )
+fi
+
+mkdir -p "${OUT}"
+ARCHIVE="${OUT}/report.tar.gz"
+"${CURL[@]}" "${URL}" -o "${ARCHIVE}"
+rm -rf "${OUT}/contents"
+mkdir -p "${OUT}/contents"
+tar -xzf "${ARCHIVE}" -C "${OUT}/contents"
+echo "Archive: ${ARCHIVE}"
+echo "Extracted: ${OUT}/contents"
+echo "Allure index (if present): ${OUT}/contents/index.html"