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Add side_by_side mode to update_materialized_view #407

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Run time

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Job	Run time
Lint with Standard	14s
Ruby 3.4, Rails 8.0	1m 22s
Ruby 3.4, Rails 7.2	1m 22s
Ruby 3.3, Rails 8.0	1m 18s
Ruby 3.3, Rails 7.2	1m 24s
Ruby 3.4, Rails main	1m 24s
Ruby head, Rails main	1m 18s
	8m 22s