Summary

There are a number of issues with updating a Datasource Tableau object:

When updating a Datasource with an extract, the extract data is removed from the archive (tdsx) file - so it cannot be published
The CLI is not keeping attributes from an updated connection when those attributes are not provided
The refresh-event element is not properly defined and formatted
The encoding was not defined with writing the updated tds/twb for a TableauFile object

Changes

Update so a TableauFile.save() will include all files, not just the twb/tds that was updated
Updated datasource CLI to keep attributes of a connection, when those attributes are not provided
Updated datasource CLI to extract all data when saving the tds before/after (on --save_tds call)
Defined dataclass for the refresh-event element
Specified encoding when writing the updated tds/twb for a TableauFile object
Fixed super().__post_init__() not being called in several child TableauFile objects

[x] tableau_utilities -d -l online -n 'Orgs Discounts' -pn 'Official Datasources - Business' -f 'Orgs Discounts.tdsx' -tds --include_extract datasource --enforce_connection
- Checked to be sure the refresh-event element was properly formatted in the XML
[x] tableau_utilities -d -n 'Orgs Discounts' -pn 'Official Datasources - Business' -f 'Orgs Discounts.tdsx' server_operate --publish datasource