docs: add serveless faq

[marcklingen]

Fixes LFE-2089

---

Important

Adds FAQ document on using Langfuse Tracing in serverless functions, providing solutions for event sending issues.

• Documentation:
  • Adds aws-lambda-and-serverless-functions.mdx to provide guidance on using Langfuse Tracing in serverless environments.
  • Explains the issue of short-lived serverless functions causing incomplete event sending.
  • Suggests using flush method to ensure events are sent before function exits.
  • Describes waitUntil method for Vercel and Cloudflare Workers to wait for flush to resolve.
  • Mentions flushAt option to configure individual event flushing.

^{This description was created by for 0aa7533. It will automatically update as commits are pushed.}

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Name	Status	Preview	Updated (UTC)
langfuse-docs	✅ Ready (Inspect)	Visit Preview	Dec 2, 2024 0:47am

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📦 Next.js Bundle Analysis for langfuse-docs

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New Page Added

The following page was added to the bundle from the code in this PR:

Page	Size (compressed)	First Load	% of Budget (350 KB)
/faq/all/aws-lambda-and-serverless-functions	27.98 KB	360.33 KB	102.95%