Write an ADR about network properties and etcd #7185

Job	Run time
Build specification using nix	1m 40s
Build & test (hydra-plutus)	1m 33s
Benchmarks (hydra-node, tx-cost, --output-directory $(pwd)/../benchmarks)	2m 18s
Build & test (hydra-tx)	1m 59s
Benchmarks (hydra-node, micro, -o $(pwd)/../benchmarks/ledger-bench.html)	1m 45s
Build & test (hydra-chain-observer)	1m 16s
Benchmarks (hydra-cluster, bench-e2e, datasets datasets/1-node.json datasets/3-nodes.json --outpu...	4m 7s
Build haddock using nix	1m 14s
Build & test (hydra-node)	7m 55s
Build & test (hydra-tui)	3m 28s
Build & test (hydra-cluster)	11m 38s
nix flake check	4m 59s
Compute cost differences	3m 35s
Publish benchmark results	7s
Documentation	3m 7s
	50m 41s

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