FIrst draft hydra head #3990

Job	Run time
Build haddock using nix	1m 23s
Build & test (plutus-cbor)	1m 33s
Build specification using nix	1m 7s
Benchmarks (hydra-node, tx-cost, --output-directory $(pwd)/../benchmarks)	2m 44s
Build & test (plutus-merkle-tree)	1m 33s
Build & test (hydra-plutus)	1m 37s
Benchmarks (hydra-node, micro, -o $(pwd)/../benchmarks/ledger-bench.html)	2m 6s
nix flake check	2m 43s
Build & test (hydra-tui)	2m 33s
Benchmarks (hydra-cluster, bench-e2e, datasets datasets/1-node.json datasets/3-nodes.json --outpu...	2m 47s
Build & test (hydra-node)	2m 44s
Benchmarks (plutus-merkle-tree, on-chain-cost, $(pwd)/../benchmarks)	1m 43s
Build & test (hydra-cluster)	2m 43s
Publish test results	1s
Documentation	1s
Publish benchmark results	1s
	27m 19s

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