Fix remaining API issues in section-3-memory notebooks

- Fixed search_memories() -> search_long_term_memory() in 01_working_memory
- Fixed enumerate(extracted_memories) -> enumerate(extracted_memories.memories)

All section-3 notebooks should now use correct API.

Author: abrookins

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

@@ -332,7 +332,7 @@
         "print(\"=\" * 50)\n",
         "\n",
         "if extracted_memories.memories:\n",
-        "    for i, memory in enumerate(extracted_memories, 1):\n",
+        "    for i, memory in enumerate(extracted_memories.memories, 1):\n",
         "        print(f\"{i}. {memory.text}\")\n",
         "        print(f\"   Type: {memory.memory_type} | Topics: {', '.join(memory.topics)}\")\n",
         "        print()\n",