fix: typo; async checkpointer postgres

modules/features/chatBot/domain/chatbot.py

@@ -44,7 +44,7 @@ def get_langchain_model(*, model_name: str) -> ChatAnthropic:
     """
     # Model name mapping
     model_mapping = {
-        "claude_4_5": "claude-4-5-sonnet",
+        "claude_4_5": "claude-sonnet-4-5",
         # Add more mappings as needed
     }
 

modules/features/chatBot/utils/checkpointer.py

@@ -3,14 +3,15 @@
 import logging
 from typing import Optional
 
-from langgraph.checkpoint.postgres import PostgresSaver
+from langgraph.checkpoint.postgres.aio import AsyncPostgresSaver
 from psycopg_pool import AsyncConnectionPool
+from psycopg.rows import dict_row
 from modules.shared.configuration import APP_CONFIG
 
 logger = logging.getLogger(__name__)
 
 # Global checkpointer instance
-_checkpointer_instance: Optional[PostgresSaver] = None
+_checkpointer_instance: Optional[AsyncPostgresSaver] = None
 _connection_pool: Optional[AsyncConnectionPool] = None
 
 
@@ -42,13 +43,14 @@ async def initialize_checkpointer() -> None:
             conninfo=connection_string,
             min_size=2,
             max_size=10,
+            kwargs={"autocommit": True, "row_factory": dict_row},
         )
 
         # Initialize the connection pool
         await _connection_pool.open()
 
-        # Create PostgresSaver with the pool
-        _checkpointer_instance = PostgresSaver(_connection_pool)
+        # Create AsyncPostgresSaver with the pool
+        _checkpointer_instance = AsyncPostgresSaver(_connection_pool)
 
         # Setup the checkpointer (creates tables if needed)
         await _checkpointer_instance.setup()
@@ -78,11 +80,11 @@ async def close_checkpointer() -> None:
     _connection_pool = None
 
 
-def get_checkpointer() -> PostgresSaver:
+def get_checkpointer() -> AsyncPostgresSaver:
     """Get the global PostgreSQL checkpointer instance.
 
     Returns:
-        The initialized PostgresSaver instance
+        The initialized AsyncPostgresSaver instance
 
     Raises:
         RuntimeError: If checkpointer is not initialized