feat: starter database design and functionality

[MitchellJC]

• Basic schema definition which is used to initialise database in init_database function.
• Notebook for examples of database function use.

[LimaoC]

lgtm. 1 question, if the user leaves the view of the camera, will this be the end of a period? So we can have a function to check that the user's in frame and the camera's aligned before counting it as a posture period.

[MitchellJC]

lgtm. 1 question, if the user leaves the view of the camera, will this be the end of a period? So we can have a function to check that the user's in frame and the camera's aligned before counting it as a posture period.

Yeah thats how I was picturing it. Probably handled by the posture tracker which would be continously checking if the current period is valid. If it suddenly becomes invalid it could stop the period there and commit a change to the DB.

[LimaoC]

lgtm. 1 question, if the user leaves the view of the camera, will this be the end of a period? So we can have a function to check that the user's in frame and the camera's aligned before counting it as a posture period.

Yeah thats how I was picturing it. Probably handled by the posture tracker which would be continously checking if the current period is valid. If it suddenly becomes invalid it could stop the period there and commit a change to the DB.

Yep sounds good to me