Genome::Process

`Genome::Process` serves as a holder of metadata related to commands that run workflows.  It is in some ways a stripped down `Genome::Model::Build`.  It will make possible `genome model build view` like views for things such as `Genome::VariantReporting` or the data importing commands.
To be sure we've found the right index, we can join on the namespace table for these:

```sql
SELECT 1/count(*) FROM pg_class c
INNER JOIN pg_namespace n ON c.relnamespace = n.oid
WHERE n.nspname = 'process' AND c.relkind = 'i' AND c.relname = 'process_process_created_by_idx';
```