Contribute example: execution telemetry or error-handling patterns

[tanayshah11]

Hi E2B team! I'd like to contribute an example to help users with common patterns. Before opening a PR, wanted to confirm direction:

Options I can ship:

1. Execution telemetry wrapper — Uses SDK callbacks (onStdout/onStderr) to capture timing, output stats from the Execution object, produces JSON summary. No infra metrics, just SDK best practices.

2. Error-handling patterns — Demonstrates timeouts, retries for transient errors, cleanup patterns, graceful degradation.

3. Real use case — CSV → analysis → chart pipeline showcasing file ops, streaming, and structured output.

Questions:

• Which would be most valuable for the community?
• Should this live in examples/ here or in e2b-cookbook?

Happy to ship whichever helps users most. Let me know!

[linear]

ENG-3253