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Add side_by_side mode to update_materialized_view #414

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Run time

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Job	Run time
Lint with Standard	13s
Ruby 3.4, Rails 8.0	1m 16s
Ruby 3.4, Rails 7.2	1m 18s
Ruby 3.3, Rails 8.0	1m 25s
Ruby 3.3, Rails 7.2	1m 19s
Ruby 3.4, Rails main	1m 27s
Ruby head, Rails main	1m 26s
	8m 24s