Fix memories slicing in 05_crafting_data_for_llms

Changed memories[:10] to memories.memories[:10] and if memories to
if memories.memories since memories is a MemoryRecordResults object.

Author: abrookins

python-recipes/context-engineering/notebooks/section-4-optimizations/05_crafting_data_for_llms.ipynb

@@ -480,8 +480,8 @@
         "current_courses = \"Current Courses:\\n- \" + \", \".join(user_data['current_courses'])\n",
         "\n",
         "# Summarize memories with LLM\n",
-        "if memories:\n",
-        "    memory_text = \"\\n\".join([f\"- {m.text}\" for m in memories[:10]])\n",
+        "if memories.memories:\n",
+        "    memory_text = \"\\n\".join([f\"- {m.text}\" for m in memories.memories[:10]])\n",
         "    \n",
         "    prompt = f\"\"\"Summarize these student memories into two sections:\n",
         "1. Preferences (course format, schedule, etc.)\n",