Fix missing MemoryClientConfig import in 01_working_memory notebook

Cell 4 and Cell 6 were using MemoryClientConfig without importing it,
causing NameError. Added the import to both cells.

Author: abrookins

python-recipes/context-engineering/notebooks/section-3-memory/01_working_memory_with_extraction_strategies.ipynb

@@ -155,6 +155,7 @@
       "metadata": {},
       "outputs": [],
       "source": [
+        "from agent_memory_client import MemoryClientConfig\n",
         "# Initialize memory client for working memory\n",
         "student_id = \"demo_student_working_memory\"\n",
         "session_id = \"session_001\"\n",
@@ -266,6 +267,7 @@
         "# Ensure memory_client is defined (in case cells are run out of order)\n",
         "if 'memory_client' not in globals():\n",
         "    # Initialize memory client with proper config\n",
+        "    from agent_memory_client import MemoryClientConfig\n",
         "    import os\n",
         "    config = MemoryClientConfig(\n",
         "        base_url=os.getenv(\"AGENT_MEMORY_URL\", \"http://localhost:8000\"),\n",