Clarify connection not found error message.
Merge branch 'connection_error_message', remote-tracking branch 'origin'
Add connect argument validation.
Merge branch 'connect_check'
Add a child workflow itersource test.
Refactor itersource detection into _find_ancestor method.
Move the iterables debug log message to where it is meaningful.
Merge branch 'join_itersource_synchronize'
Add period separator to qualified hierarchy node id.
Merge branch 'hierarchy_node_id'