fix: error on messaging endpoint on UI

[chadgauth]

add pnpm lockfile for those who prefer pnpm over npm

Please describe the purpose of this pull request.
Is it to add a new feature? Is it to fix a bug?
Fixes the bug when chatting with an agent with the UI. Most likely from a recent API change.

How to test
How can we test your PR during review? What commands should we run? What outcomes should we expect?
Run the memgpt server and then the frontend

Have you tested this PR?
Have you tested the latest commit on the PR? If so please provide outputs from your tests.

include: src/**/*.{test,spec}.{js,mjs,cjs,ts,mts,cts,jsx,tsx}
No test files found, exiting with code 0
exclude:  **/node_modules/**, **/dist/**, **/cypress/**, **/.{idea,git,cache,output,temp}/**, **/{karma,rollup,webpack,vite,vitest,jest,ava,babel,nyc,cypress,tsup,build}.config.*
watch exclude:  **/node_modules/**, **/dist/**

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 >  NX   Successfully ran target test for project memgpt (2s)

Related issues or PRs
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I'm not seeing one.

Is your PR over 500 lines of code?
If so, please break up your PR into multiple smaller PRs so that we can review them quickly, or provide justification for its length.

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