[Draft] Store `speculative_start_value` for each aggregator #32437

Job	Run time
permission-check	0s
determine-docker-build-metadata	0s
file_change_determinator	0s
rust-images	0s
rust-images-failpoints	0s
rust-images-indexer	0s
rust-images-performance	0s
rust-images-consensus-only-perf-test	0s
cli-e2e-tests	0s
indexer-grpc-e2e-tests	0s
node-api-compatibility-tests	0s
forge-multiregion-test	0s
forge-consensus-only-perf-test	0s
forge-framework-upgrade-test	0s
forge-compat-test	0s
forge-e2e-test	0s
	0s

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