chore: backup before code cleanup

Backup commit before executing remove-unused-code proposal.
This includes all pending changes and new features.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/app/services/processing_orchestrator.py

@@ -335,6 +335,14 @@ class OCRPipeline(ProcessingPipeline):
 
             processing_time = time.time() - start_time
 
+            # Debug: Check if ocr_result has rebuild_stats
+            if 'enhanced_results' in ocr_result:
+                for page_result in ocr_result['enhanced_results']:
+                    for elem in page_result.get('elements', []):
+                        if elem.get('type') == 'table' or (hasattr(elem.get('type'), 'value') and elem.get('type').value == 'table'):
+                            has_rebuild = 'rebuild_stats' in elem
+                            logger.info(f"[ORCHESTRATOR] Before converter - Table {elem.get('element_id')}: has rebuild_stats={has_rebuild}")
+
             # Convert to UnifiedDocument
             unified_doc = self.converter.convert(
                 ocr_result,