Do you have any links on the "dependency-graph dataflow system" that you are talking about? Sounds a little bit similar to what I'm trying to do, except at higher scale.
Imagine injecting Futures into your code. Now imagine injecting them, but having the Provider record a lot of metadata about who you were calling, how you were calling it, how long it took, whether an error occurred, letting an SRE turn off the call, etc.
