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Add side_by_side mode to update_materialized_view #420

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Run time

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Job	Run time
Lint with Standard	14s
Ruby 3.4, Rails 8.0	1m 27s
Ruby 3.4, Rails 7.2	1m 23s
Ruby 3.3, Rails 8.0	1m 28s
Ruby 3.3, Rails 7.2	1m 29s
Ruby 3.4, Rails main	1m 51s
Ruby head, Rails main	3m 2s
	10m 54s