OptionalgraceGrace window applied per partition for late events.
OptionalgroupsDeclared partition values (mirrors batch partitionBy({ groups })).
OptionalorderingOrdering mode for each partition. Defaults to 'strict'.
OptionalretentionRetention applied to each partition's sub-buffer independently.
Per-partition retention and grace settings for a partitioned live view. Each partition is its own bounded buffer with these limits; the source
LiveSource's own retention does not propagate.