[Project] Avoid loading information prematurely

Many of the queries in Graph Explorer attempt to gather more information than they need at that moment.

For example:

- Schema sync gathers gathers edge data, which is only used for edge styling
- Schema sync gathers node & edge total counts, which is shown as a nice summary in connections
- Adding a node to the graph gathers neighbor counts by type, which is used in the expand side bar for the selected node, the collapsed neighbor count badge, and the total neighbors in the table representation.
- Adding a node to the graph gathers node attributes and values, which is used in the details side bar for the selected node and in search

## Tasks
- [ ] #373
- [ ] #351
- [x] #341