update langchain and add arxiv and pubmed tools

prisma/migrations/20240324101818_add_more_tools/migration.sql

@@ -0,0 +1,10 @@
+-- AlterEnum
+-- This migration adds more than one value to an enum.
+-- With PostgreSQL versions 11 and earlier, this is not possible
+-- in a single migration. This can be worked around by creating
+-- multiple migrations, each migration adding only one value to
+-- the enum.
+
+
+ALTER TYPE "AgentTool" ADD VALUE 'ARXIV';
+ALTER TYPE "AgentTool" ADD VALUE 'PUBMED';