chore: expected interface to multi-tenancy usage

[trgalho]

Define the expected interface to use netacea module in a multi-tenancy environment.

[whiteh]

Thanks for your PR! We'll pick this up with the team and review the proposal.

Two things I wondered about when reading it was how this interacted with the ingest queue in the backend and how performance would be affected instantiating a client on each log and access lua block. A couple of things for us to investigate.