* chaning default model to gpt-4o-mini
* adding release notes
* fixing some missed tests
* fixing some more missed tests
* fixing one last missed test
* fixing linting issues
* making pylint happy about an end2end test
* chaning if test to walruss operator
* fixing azure embedder from ada to text-embedding-ada-002
* initial implementation
* add support for meta and add ChatMessage tests
* explictly cast types for mypy and update reno
* leave inputs unchanged avoiding side effects
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Co-authored-by: Julian Risch <julian.risch@deepset.ai>