Custom event schema / CloudEvents

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Description
We are evaluating the support of custom event schema and CloudEvents, an open-source specification that defines events in a common format. If you want to give your feedback, please reach out to us by commenting here.

Additional context

1. What event sources and triggers do you currently use with Lambda? (e.g., API Gateway, EventBridge, S3, custom sources)

2. Does your organization use a common schema or format for events across different systems? If yes, what format?

3. Are you familiar with the CloudEvents specification? If so, are you already using it in any part of your architecture?

4. What challenges do you face with the current event formats when integrating Lambda with other services or systems?