Storing artifacts to next session #18

Similar to fetch XML, it is stored by the connection and reloaded when the connection is reopened.

See saving:
ClosingPlugin: https://github.com/rappen/FetchXMLBuilder/blob/FetchXMLBuilder-1.2026.05.001/FetchXmlBuilder/FetchXmlBuilder.cs#L237
Calls: https://github.com/rappen/FetchXMLBuilder/blob/FetchXMLBuilder-1.2026.05.001/FetchXmlBuilder/FetchXmlBuilder.cs#L258
Saving: https://github.com/rappen/FetchXMLBuilder/blob/FetchXMLBuilder-1.2026.05.001/FetchXmlBuilder/FetchXmlBuilder.cs#L376-L386

See loading:
ConnectionUpdated: https://github.com/rappen/FetchXMLBuilder/blob/FetchXMLBuilder-1.2026.05.001/FetchXmlBuilder/FetchXmlBuilder.cs#L507
Calls: https://github.com/rappen/FetchXMLBuilder/blob/FetchXMLBuilder-1.2026.05.001/FetchXmlBuilder/FetchXmlBuilder.cs#L513
Loading: https://github.com/rappen/FetchXMLBuilder/blob/FetchXMLBuilder-1.2026.05.001/FetchXmlBuilder/FetchXmlBuilder.cs#L489-L501
Used: https://github.com/rappen/FetchXMLBuilder/blob/FetchXMLBuilder-1.2026.05.001/FetchXmlBuilder/FetchXmlBuilder.cs#L531

• Deployment: Online
• DB Version: 9.2.26052.150
• Connection Controls Version: 1.2025.9.64
• XrmToolBox Version: 1.2025.10.74
• Tool Version: 1.2026.2.1