expose stub endpoint for the engine

api/api.py

api/core.py

api/dao/reaperutil.py

api/files.py

api/schemas/input/acquisition.json

api/schemas/input/collection.json

api/schemas/input/download.json

api/schemas/input/enginemetadata.json

api/schemas/input/project.json

api/schemas/input/session.json

api/schemas/mongo/acquisition.json

api/schemas/mongo/collection.json

api/schemas/mongo/group.json

api/schemas/mongo/project.json

api/schemas/mongo/session.json

api/schemas/mongo/user.json

api/storefiles.py

api/validators.py