feat(replication): Add support for relation changes #377
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This PR adds support for the
Relationmessage, which can now emitRelationChangeevents to describe what changed in a table. In addition, it defaults allColumnSchemas tonullablesince we are unable to infer nullability fromRelationmessages because the field is omitted; thus, it's better if we just make everything nullable since it gives more flexibility.The main limitation of this approach is that we do not recognize column renames because of a limitation of the replication protocol, so when a rename is performed, it is emitted as
DROP+ADD.