Readings
Where a reading is stored
What is saved when you draw, and what is not.
Each draw is a row in the database: the spread, the question, the cards, and the interpretation. The share link is the id of that row.
A verified account is attached only when you draw while signed in. Guests still get a link. They do not get a history list.
The site stores a hash of the network address with the draw so one visitor cannot request unlimited interpretations. It does not store the address itself in that column.
Card texts live in the app, not in the database. If a meaning is edited later, old readings keep the interpretation that was written at the time, and the card page shows the newer text.