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Add side_by_side mode to update_materialized_view #410

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Run time

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Job	Run time
Lint with Standard	13s
Ruby 3.4, Rails 8.0	1m 17s
Ruby 3.4, Rails 7.2	1m 23s
Ruby 3.3, Rails 8.0	1m 17s
Ruby 3.3, Rails 7.2	1m 17s
Ruby 3.4, Rails main	1m 30s
Ruby head, Rails main	1m 27s
	8m 24s