Assorted data model changes

4 stories from PT:
[41461107] As an Archivist I want to record a Scope Note for a Subject 0.2_feedback, 0.3_feedback, data_model_change, data_model_high_priority, subjects  ~  started feature, from Mark Matienzo, created 4 months ago
[43512693] Add contact properties, etc. to Users 0.3_feedback, agents, data_model_change, data_model_high_priority  ~  started feature, from Mark Matienzo, created 2 months ago
[44675539] As an Archivist I want to declare a Resource Component as "internal only" data_model_change, data_model_high_priority  ~  started feature, from Mark Matienzo, created about 1 month ago
[46217967] Extents: container_summary and physical_details should be a TextField data_model_change, legacy_apps  ~  started feature, from Mark Matienzo, created 24 days ago