when path is invalid, lambda extension does not error out, only warns.

[cwhiting-fusable]

was trying to diagnose why lambda layers wasn't working.

Instead of erroring out, it silently warns inside the JSON and returns a blank/undefined object in data:

"Invalid path for a versioned K/V secrets engine. See the API docs for the appropriate API endpoints to use. If using the Vault CLI, use 'vault kv get' for this operation."

IMO it should cause a fatal error if the result is a blank .data.data