Create an aggregate from subset of messages #573

Job	Run time
yarn-test (stable, wasm32-unknown-unknown)	2m 3s
wasm-test (1.67, wasm32-unknown-unknown)	4m 14s
check	24s
python-test (stable, wasm32-unknown-unknown, 3.11)	1m 54s
wasm-test (stable, wasm32-unknown-unknown)	3m 46s
python-test (stable, wasm32-unknown-unknown, 3.12)	1m 36s
test (x86_64-unknown-linux-gnu, 1.67)	2m 47s
test (x86_64-unknown-linux-gnu, stable)	2m 39s
compile-benchmarks	4m 4s
codecov	7m 35s
benchmark	0s
	31m 2s

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