Chatbot with message summarization & external DB memory

Chatbot with message summarization & external DB memory Review We've covered how to customize graph state schema and reducer. We've also shown a number of tricks for trimming or filtering messages in graph state. We've used these concepts in a Chatbot with memory that produces a running summary of the conversation. Goals But, what if we want our Chatbot to have memory that persists indefinitely? Now, we'll introduce some more advanced checkpointers that support external databases. Here, we'll show how to use Sqlite as a checkpointer, but other checkpointers, such as Postgres are available!