[Future Work]: Make these operations lazy

[todo]

LDfields/packages/delegator/src/input-delegator.ts

Lines 37 to 42 in e517e19

	// TODO [Future Work]: Make these operations lazy
	this.fields = sortedFields
	?? getSortedFields<T, Props, ExtraData>(settings, fields, genericFields);
	this.settingsRecord = settingsRecord ?? settingsToRecord(settings);
	}

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This issue was generated by todo based on a TODO comment in e517e19. It's been assigned to @jeswr because they committed the code.