Add missing MemoryClientConfig import to section-4 notebooks

Fixed 02_retrieval_strategies.ipynb and 05_crafting_data_for_llms.ipynb
to import MemoryClientConfig from redis_context_course.

Author: abrookins

python-recipes/context-engineering/notebooks/section-4-optimizations/02_retrieval_strategies.ipynb

@@ -155,7 +155,7 @@
         "import tiktoken\n",
         "from langchain_openai import ChatOpenAI\n",
         "from langchain_core.messages import SystemMessage, HumanMessage\n",
-        "from redis_context_course import CourseManager, MemoryClient\n",
+        "from redis_context_course import CourseManager, MemoryClient, MemoryClientConfig\n",
         "\n",
         "# Initialize\n",
         "course_manager = CourseManager()\n",

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

@@ -159,7 +159,7 @@
         "import tiktoken\n",
         "from langchain_openai import ChatOpenAI\n",
         "from langchain_core.messages import SystemMessage, HumanMessage\n",
-        "from redis_context_course import CourseManager, MemoryClient, redis_config\n",
+        "from redis_context_course import CourseManager, MemoryClient, MemoryClientConfig, redis_config\n",
         "\n",
         "# Initialize\n",
         "course_manager = CourseManager()\n",