Network topology awareness

[phillebaba]

Describe the problem to be solved

When doing lookups in the DHT the first peer found will be returned. The query does not take into consideration the network topology of the Kuberentes cluster. Most cloud providers have multiple zones per region. Network traffic within the same zone is usually faster and cheaper compared to cross zone traffic. Spegel should prioritize peers in the same zone over other peers when possible.

Proposed solution to the problem

There has been some interesting research already done on the topic about partitioning.

https://research.protocol.ai/publications/enriching-kademlia-by-partitioning/monteiro2022.pdf

We need to decide on the best solution to partition the DHT to avoid added latency for lookups.

Relates to #551 and #530