Support schemas in Pipeline

[thelinuxlich]

Cloudflare Pipelines supports passing a schema parameter containing a JSON object with a fields property mapping to an array of fields with supported types (as detailed in this link https://developers.cloudflare.com/pipelines/streams/manage-streams/), the event is validated and the data is dropped if it doesn't pass the schema. It would be nice if Alchemy supported this option.

[sam-goodwin]

This would be neat. Should we model JSON schema directly or integrate with StandardSchema so you can use Zod/ArkType/etc.?

[thelinuxlich]

Then Alchemy would parse the data using the schema before sending to the pipeline?