Investigate move to edge function

[foolo]

Investigate if api/batch_update should be an edge function instead of serverless, see
https://www.prisma.io/blog/database-access-on-the-edge-8F0t1s1BqOJE

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For prisma instancing in edge mode, https://www.prisma.io/docs/orm/more/help-and-troubleshooting/help-articles/nextjs-prisma-client-dev-practices is probably also relevant

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https://vercel.com/docs/functions/serverless-functions/runtimes#edge

Pricing is based on compute time – You're charged for time processing any requests and not for your function is fetching data. This is ideal for querying databases or AI services that may have longer request times