fix(indexer): handle nested interaction structure in chat logs

app/services/history_indexer.py

@@ -84,11 +84,20 @@ class HistoryIndexer:
                     errors += 1
                     continue
                 
-                # We expect entry to have 'question', 'answer', 'role', 'timestamp'
-                if 'question' not in entry or 'answer' not in entry:
+                # Check for nested interaction structure (from ChatLogger)
+                interaction = entry.get('interaction', {})
+                question = interaction.get('question')
+                answer = interaction.get('answer')
+
+                if not question or not answer:
+                    # Fallback for older flat logs if they exist
+                    question = entry.get('question')
+                    answer = entry.get('answer')
+                
+                if not question or not answer:
                     continue
 
-                text_content = f"Q: {entry.get('question')}\nA: {entry.get('answer')}"
+                text_content = f"Q: {question}\nA: {answer}"
                 
                 # Create a deterministic ID based on content + timestamp
                 # or just use loop index if file is immutable (risky)