possible fix permission issues and fix thread timing issues (#6061)

# Description of Changes

<!--
Please provide a summary of the changes, including:

- What was changed
- Why the change was made
- Any challenges encountered

Closes #(issue_number)
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---

## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### Translations (if applicable)

- [ ] I ran
[`scripts/counter_translation.py`](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/docs/counter_translation.md)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md#6-testing)
for more details.

testing/test.sh

@@ -340,6 +340,8 @@ capture_file_list() {
         -not -path '*/tmp/hsperfdata_stirlingpdfuser/*' \
         -not -path '*/tmp/hsperfdata_root/*' \
         -not -path '*/tmp/stirling-pdf/jetty-*/*' \
+        -not -path '*/tmp/stirling-pdf/lu*' \
+        -not -path '*/tmp/stirling-pdf/tmp*' \
         -not -path '/tmp/lu*' \
         -not -path '*/tmp/*/user/registrymodifications.xcu' \
         -not -path '/app/stirling.aot' \
@@ -369,8 +371,10 @@ capture_file_list() {
             -not -path '*/tmp/hsperfdata_root/*' \
             -not -path '*/tmp/stirling-pdf/hsperfdata_stirlingpdfuser/*' \
             -not -path '*/tmp/stirling-pdf/jetty-*/*' \
-            -not -path '/tmp/lu*' \
-            -not -path '/tmp/tmp*' \
+            -not -path '*/tmp/stirling-pdf/lu*' \
+            -not -path '*/tmp/stirling-pdf/tmp*' \
+            -not -path '*/tmp/lu*' \
+            -not -path '*/tmp/tmp*' \
             -not -path '/app/stirling.aot' \
             -not -path '*/tmp/stirling.aotconf' \
             -not -path '*/tmp/aot-*.log' \
@@ -898,6 +902,36 @@ main() {
                 passed_tests+=("Stirling-PDF-Regression $CONTAINER_NAME")
             else
                 echo "WARNING: Unexpected temporary files detected after behave tests!"
+
+                # Save temp file failure details to a log for the test report
+                local tempfile_log="$REPORT_DIR/temp-files-failure.log"
+                {
+                    echo "=== Temp File Regression Failure ==="
+                    echo "Container: $CONTAINER_NAME"
+                    echo ""
+                    echo "=== Before snapshot ==="
+                    cat "$BEFORE_FILE" 2>/dev/null || echo "(empty)"
+                    echo ""
+                    echo "=== After snapshot ==="
+                    cat "$AFTER_FILE" 2>/dev/null || echo "(empty)"
+                    echo ""
+                    echo "=== Diff (new/changed files) ==="
+                    cat "$DIFF_FILE" 2>/dev/null || echo "(empty)"
+                    echo ""
+                    echo "=== Leftover temp files ==="
+                    cat "${DIFF_FILE}.tmp" 2>/dev/null || echo "(none found)"
+                    echo ""
+                    echo "=== Docker logs ==="
+                    docker logs "$CONTAINER_NAME" 2>&1 | tail -200
+                } > "$tempfile_log" 2>/dev/null || true
+
+                # Copy snapshots to report dir for artifact upload
+                cp "$BEFORE_FILE" "$REPORT_DIR/" 2>/dev/null || true
+                cp "$AFTER_FILE" "$REPORT_DIR/" 2>/dev/null || true
+                cp "$DIFF_FILE" "$REPORT_DIR/" 2>/dev/null || true
+                cp "${DIFF_FILE}.tmp" "$REPORT_DIR/files_diff_tmp_matches.txt" 2>/dev/null || true
+
+                test_failure_logs["Stirling-PDF-Regression-Temp-Files"]="$tempfile_log"
                 failed_tests+=("Stirling-PDF-Regression-Temp-Files")
             fi
             passed_tests+=("Stirling-PDF-Regression $CONTAINER_NAME")