Complete and document RPCh 1-hop funds flow

[tolbrino]

Description

Ensure all manual and automatic processes related to keeping RPCh 1-hop running are documented and implemented.

Relevant issues

Definition of DONE

• [ ] RPCh uses promisucous strategy configured to use peers with v2.1.0 and above
• [ ] Funds (xdai, wxhopr) in all safes used by RPCh and the main RPCh funding account are monitored
• [ ] Workflow for internal monthly accounting in the place and defined
• [ ] It is ensured that RPCh infra will not run out of funds without the team noticing