Use More Incremental Models

[pnadolny13]

These are all running over 5 mins, we can definitely use incremental models more to cut this down. Using a date filter the context tables should take < 1 min each which would be huge improvements.

1. model.squared.unstruct_exec_flattened
2. model.squared.unstruct_context_flattened
3. model.squared.unstruct_event_flattened
4. model.squared.context_environment
5. model.squared.context_cli
6. model.squared.context_plugins
7. model.squared.context_exception
8. model.squared.context_project
9. model.squared.unstructured_executions
10. model.squared.structured_executions