CommandHandler must not discard information when creating events

[bwaidelich]

Currently, in some cases, resulting events don't contain all information that was contained in the original command.

Right now we can always extract this information from the command that is serialized to the event metadata, but we should not rely on that internal mechanism.

For example: the MoveNodeAggregate command contains the $relationDistributionStrategy but the corresponding NodeAggregateWasMoved event only contains the resulting $succeedingSiblingsForCoverage.

[bwaidelich]

See https://github.com/neos/neos-ui/pull/3881/files#r1835467247 for an example on how the current implementation can lead to issues