Integration: External JSON RPC Source (chargebyte)

[OliverHennhoefer]

@seffs Für den Backlog: Wir könnten zukünftig auch Daten eines anderen Hardware-Herstellers beziehen; allerdings über eine JSON RPC Schnittstelle (pull). Hier mal nur als Placeholder.

EVerest/EVerest#1324
https://chargebyte.atlassian.net/wiki/external/NDkzYjg5MzAxY2U3NDg0MmE0N2MyOGQwZTcyOWYxNTA

[seffs]

Interesting read.

I have two interim comments:

1. They will start with a JSON-RPC over Websockets implementation. This "forces" us to adopt a similar approach to our current Proxy, since we still want to write telemetry into our DB and serve it as a single source of truth. Nothing new for our stack (for now).

2. They already provide an MQTT broker. Given our system and potential RBAC implementation, this could serve us well as a fallback if necessary.