ci(test-quickget): use temp file to collect distro rows for sorting

Replace string concatenation with temp file approach to fix issue where
only the first distro appeared in the summary table. Writing rows to a
temp file and sorting it directly is more robust than piping concatenated
strings through sort.

.github/workflows/test-quickget.yml

@@ -113,8 +113,8 @@ jobs:
           TOTAL_SKIPPED=0
           HAS_FAILURES=false
 
-          # Build per-distro table rows
-          DISTRO_ROWS=""
+          # Temp file for collecting per-distro table rows
+          TEMP_ROWS=$(mktemp)
 
           for json_file in results/result-*/result.json; do
             [ -f "$json_file" ] || continue
@@ -139,12 +139,9 @@ jobs:
               STATUS="✅"
             fi
 
-            DISTRO_ROWS="${DISTRO_ROWS}$(printf '| %s | %s | %s | %s | %s |\n' "${DISTRO}" "${PASSED}" "${FAILED}" "${SKIPPED}" "${STATUS}")"
+            echo "| ${DISTRO} | ${PASSED} | ${FAILED} | ${SKIPPED} | ${STATUS} |" >> "$TEMP_ROWS"
           done
 
-          # Sort distro rows alphabetically
-          DISTRO_ROWS_SORTED=$(echo "$DISTRO_ROWS" | sort)
-
           # Write summary header
           echo "## Test Results 📊" >> "$GITHUB_STEP_SUMMARY"
           echo "" >> "$GITHUB_STEP_SUMMARY"
@@ -160,7 +157,7 @@ jobs:
           echo "" >> "$GITHUB_STEP_SUMMARY"
           echo "| Distro | Passed | Failed | Skipped | Status |" >> "$GITHUB_STEP_SUMMARY"
           echo "|--------|--------|--------|---------|--------|" >> "$GITHUB_STEP_SUMMARY"
-          echo -n "$DISTRO_ROWS_SORTED" >> "$GITHUB_STEP_SUMMARY"
+          sort "$TEMP_ROWS" >> "$GITHUB_STEP_SUMMARY"
 
           # Collect and display failed URLs if any
           if [ "$HAS_FAILURES" = true ]; then
@@ -183,6 +180,9 @@ jobs:
           echo "Total Skipped: ${TOTAL_SKIPPED}"
           echo "=================="
 
+          # Clean up temp file
+          rm -f "$TEMP_ROWS"
+
           # Exit with failure if any distro had failures
           if [ "$HAS_FAILURES" = true ]; then
             echo "::error::Some distros have failed downloads. Check the summary for details."