Seems similar to Veneur (like many other projects mentioned in comments here; didn't realize this space was so crowded!) - down to the first two letters of the name: https://github.com/stripe/veneur
Veneur is more metrics-focused, but might offer inspiration as you work on metrics support in Vector - in particular the SSF source, internal aggregation, and Datadog and SignalFX sinks.
Veneur is more metrics-focused, but might offer inspiration as you work on metrics support in Vector - in particular the SSF source, internal aggregation, and Datadog and SignalFX sinks.