Add new project fields

[katamartin]

Add new status and listed_at fields so they may be integrated with while data is populated. Definitely defer to @andersy005 and @badgley on the right names for these fields!

[andersy005]

the database now includes a status field. additionally, the listed_at field is available for car registry. after discussing with @badgley, we have determined that we can extract listed_at for art-trees and acr by scraping project details. however, we concluded that it may not be worth the effort at this time. unfortunately, we do not have a consistent method of obtaining the listed_at information for verra, gcc and gs. due to the limited availability of listed_at data, we may need to make a decision regarding the functionality (such as "charts/project_by_listing_date") that relies on the presence of listed_at information

[katamartin]

due to the limited availability of listed_at data, we may need to make a decision regarding the functionality (such as "charts/project_by_listing_date") that relies on the presence of listed_at information

Naively, I would suggest that we just filter out projects that do not have listed_at (or represent them will a null bucket) for charts/project_by_listing_date. But if a significant percentage of projects will have an empty listed_at, this probably isn't the right top-level chart or navigation element for filtering projects.

Possible next steps:

• @andersy005 is it possible to grab the ratio of projects that will initially have empty listed_at?
• @badgley @andersy005 given this ratio, thoughts on what a more helpful summary chart could be?