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Add side_by_side mode to update_materialized_view #411

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Run time

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Job	Run time
Lint with Standard	12s
Ruby 3.4, Rails 8.0	1m 16s
Ruby 3.4, Rails 7.2	1m 22s
Ruby 3.3, Rails 8.0	1m 29s
Ruby 3.3, Rails 7.2	1m 23s
Ruby 3.4, Rails main	1m 18s
Ruby head, Rails main	1m 18s
	8m 18s