Merge pull request #148 from scipp/save-parameters-optional #398

Job	Run time
Formatting and static analysis	10s
Tests (ubuntu-24.04, 3.10, py310) / package-test	20s
Tests (ubuntu-24.04, 3.10, py310) / test	1m 11s
docs / Build documentation	2m 43s
	4m 24s

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