source-object-nesting pipeline

[delucchi-cmu]

Similar to the old SOAP (source-object-association-pipeline), a pipeline that attempts to match source and object partitions up to create nested light curves.

Pipeline should be kind of an intersection of catalog import and SOAP principles:

• do something similar to "soft soap" and find all source partitions with corresponding sources for all objects in the object partition
• for the object partition, nest the sources it contains
• if the object partition exceeds some threshold, split further
• write parquet files
• create catalog files.