What is best practice for api calls (requests session). My issue is: I would like to use the same session object for my scheduled flows. I tried just caching the session object, but this doesn't lead to the desired results. Any best practices here in how to handle sessions?

best practices for that would be the same as with any REST API - I can imagine it's not the answer you're looking for so could you provide some code examples showing what you're trying to achieve? Usually you don't need to interact with the Orion client directly