Fix ClientMemoryRecord memory_type - use string not MemoryType filter

ClientMemoryRecord.memory_type expects a string (or MemoryTypeEnum), not a
MemoryType filter object. The MemoryType filter is only for search parameters.

Changed back:
- memory_type=MemoryType(eq=\semantic\) -> memory_type=\semantic\
- memory_type=MemoryType(eq=\episodic\) -> memory_type=\episodic\

The MemoryType filter is still used correctly in search_long_term_memory calls.

Author: abrookins

python-recipes/context-engineering/notebooks/section-3-memory/02_long_term_memory.ipynb

@@ -146,25 +146,25 @@
         "# Store student preferences\n",
         "await memory_client.create_long_term_memory([ClientMemoryRecord(\n",
         "    text=\"Student prefers online courses over in-person classes\",\n",
-        "    memory_type=MemoryType(eq=\"semantic\"),\n",
+        "    memory_type=\"semantic\",\n",
         "    topics=[\"preferences\", \"course_format\"]\n",
         ")])\n",
         "\n",
         "await memory_client.create_long_term_memory([ClientMemoryRecord(\n",
         "    text=\"Student's major is Computer Science with a focus on AI/ML\",\n",
-        "    memory_type=MemoryType(eq=\"semantic\"),\n",
+        "    memory_type=\"semantic\",\n",
         "    topics=[\"academic_info\", \"major\"]\n",
         ")])\n",
         "\n",
         "await memory_client.create_long_term_memory([ClientMemoryRecord(\n",
         "    text=\"Student wants to graduate in Spring 2026\",\n",
-        "    memory_type=MemoryType(eq=\"semantic\"),\n",
+        "    memory_type=\"semantic\",\n",
         "    topics=[\"goals\", \"graduation\"]\n",
         ")])\n",
         "\n",
         "await memory_client.create_long_term_memory([ClientMemoryRecord(\n",
         "    text=\"Student prefers morning classes, no classes on Fridays\",\n",
-        "    memory_type=MemoryType(eq=\"semantic\"),\n",
+        "    memory_type=\"semantic\",\n",
         "    topics=[\"preferences\", \"schedule\"]\n",
         ")])\n",
         "\n",
@@ -189,21 +189,21 @@
         "# Store course enrollment events\n",
         "await memory_client.create_long_term_memory([ClientMemoryRecord(\n",
         "    text=\"Student enrolled in CS101: Introduction to Programming on 2024-09-01\",\n",
-        "    memory_type=MemoryType(eq=\"episodic\"),\n",
+        "    memory_type=\"episodic\",\n",
         "    topics=[\"enrollment\", \"courses\"],\n",
         "    metadata={\"course_code\": \"CS101\", \"date\": \"2024-09-01\"}\n",
         ")])\n",
         "\n",
         "await memory_client.create_long_term_memory([ClientMemoryRecord(\n",
         "    text=\"Student completed CS101 with grade A on 2024-12-15\",\n",
-        "    memory_type=MemoryType(eq=\"episodic\"),\n",
+        "    memory_type=\"episodic\",\n",
         "    topics=[\"completion\", \"grades\"],\n",
         "    metadata={\"course_code\": \"CS101\", \"grade\": \"A\", \"date\": \"2024-12-15\"}\n",
         ")])\n",
         "\n",
         "await memory_client.create_long_term_memory([ClientMemoryRecord(\n",
         "    text=\"Student asked about machine learning courses on 2024-09-20\",\n",
-        "    memory_type=MemoryType(eq=\"episodic\"),\n",
+        "    memory_type=\"episodic\",\n",
         "    topics=[\"inquiry\", \"machine_learning\"],\n",
         "    metadata={\"date\": \"2024-09-20\"}\n",
         ")])\n",
@@ -299,7 +299,7 @@
         "try:\n",
         "    await memory_client.create_long_term_memory([ClientMemoryRecord(\n",
         "        text=\"Student prefers online courses over in-person classes\",\n",
-        "        memory_type=MemoryType(eq=\"semantic\"),\n",
+        "        memory_type=\"semantic\",\n",
         "        topics=[\"preferences\", \"course_format\"]\n",
         ")])\n",
         "    print(\"❌ Duplicate was stored (unexpected)\")\n",
@@ -311,7 +311,7 @@
         "try:\n",
         "    await memory_client.create_long_term_memory([ClientMemoryRecord(\n",
         "        text=\"Student likes taking classes online instead of on campus\",\n",
-        "        memory_type=MemoryType(eq=\"semantic\"),\n",
+        "        memory_type=\"semantic\",\n",
         "        topics=[\"preferences\", \"course_format\"]\n",
         ")])\n",
         "    print(\"Memory stored (may be merged with existing similar memory)\")\n",