FIrst draft hydra head #3993

Job	Run time
Build haddock using nix	1m 21s
Benchmarks (hydra-node, tx-cost, --output-directory $(pwd)/../benchmarks)	2m 46s
Build specification using nix	58s
Benchmarks (hydra-node, micro, -o $(pwd)/../benchmarks/ledger-bench.html)	1m 58s
Build & test (plutus-cbor)	1m 34s
Benchmarks (hydra-cluster, bench-e2e, datasets datasets/1-node.json datasets/3-nodes.json --outpu...	5m 11s
nix flake check	4m 19s
Build & test (plutus-merkle-tree)	1m 39s
Benchmarks (plutus-merkle-tree, on-chain-cost, $(pwd)/../benchmarks)	1m 41s
Build & test (hydra-plutus)	1m 32s
Build & test (hydra-tui)	2m 31s
Build & test (hydra-node)	4m 18s
Build & test (hydra-cluster)	8m 2s
Publish benchmark results	0s
Publish test results	8s
Documentation	1m 2s
	39m 0s

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