Fix KeyError in 05_crafting_data_for_llms

Use .get() with default value to handle missing profile_text key.

Author: abrookins

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

@@ -594,7 +594,7 @@
         "\n",
         "profile_data = redis_client.get(f\"user_profile:{user_data['student_id']}\")\n",
         "profile_json = json.loads(profile_data) if profile_data else {}\n",
-        "profile_text = profile_json['profile_text']\n",
+        "profile_text = profile_json.get('profile_text', 'No profile available')\n",
         "\n",
         "system_prompt = f\"\"\"You are a class scheduling agent for Redis University.\n",
         "\n",