* minor refactor for getting invariant api keys for guardrailing
* allow different guardrailing api key
* tests
* fix comment + import
* improved unauthorized handling
* guardrails from header
* use in-file guardrails in client.py
* support case without request
* remove client script
* tests: guardrailing rule passed in header
* include checked guardrails in annotation extra metadata
* include guardrailing action
* update guardrail metadata
Luca Beurer-Kellner