feat(deepagents): allow overriding default middleware for deepagent and subagents#204

Alexei Vedernikov (alvedder) wants to merge 2 commits intolangchain-ai:mainlangchain-ai/deepagentsjs:mainfrom

alvedder:alvedder/middleware-overridealvedder/deepagentsjs:alvedder/middleware-overrideCopy head branch name to clipboard