Add blockfrost mode to hydra-chain-observer #5885

Job	Run time
Build & test (plutus-cbor)	1m 47s
Build & test (plutus-cbor)	1m 47s
Build & test (plutus-merkle-tree)	1m 52s
Build & test (plutus-merkle-tree)	1m 52s
Build & test (hydra-plutus)	2m 11s
Build & test (hydra-plutus)	2m 11s
Build haddock using nix	6m 44s
Build haddock using nix	6m 44s
Build & test (hydra-tui)	4m 53s
Build & test (hydra-tui)	4m 53s
Benchmarks (hydra-node, tx-cost, --output-directory $(pwd)/../benchmarks)	6m 21s
Benchmarks (hydra-node, tx-cost, --output-directory $(pwd)/../benchmarks)	6m 21s
Benchmarks (hydra-node, micro, -o $(pwd)/../benchmarks/ledger-bench.html)	5m 38s
Benchmarks (hydra-node, micro, -o $(pwd)/../benchmarks/ledger-bench.html)	5m 38s
Build & test (hydra-node)	11m 19s
Build & test (hydra-node)	11m 19s
Benchmarks (hydra-cluster, bench-e2e, datasets datasets/1-node.json datasets/3-nodes.json --outpu...	9m 43s
Benchmarks (hydra-cluster, bench-e2e, datasets datasets/1-node.json datasets/3-nodes.json --outpu...	9m 43s
Build & test (hydra-tx)	2m 24s
Build & test (hydra-tx)	2m 24s
nix flake check	8m 35s
nix flake check	8m 20s
Benchmarks (plutus-merkle-tree, on-chain-cost, $(pwd)/../benchmarks)	1m 59s
Benchmarks (plutus-merkle-tree, on-chain-cost, $(pwd)/../benchmarks)	1m 59s
Build & test (hydra-cluster)	11m 38s
Build & test (hydra-cluster)	11m 38s
Build specification using nix	2m 16s
Build specification using nix	2m 16s
Publish benchmark results	7s
Publish benchmark results	7s
Publish test results	18s
Publish test results	18s
Documentation	3m 43s
Documentation	3m 43s
	2h 42m 41s

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