Prototype the AI forecasting on Manifold

[berekuk]

• fetch all or at least historical markets to the database
• write a script that feeds market data to Squiggle AI and runs workflows on each one

There are many possible follow-ups to this:

• smart filtering on markets to select a subset of markets that we want to predict on
• tag runs somehow, maybe by exporting to Squiggle Hub models in a group for future reference
• evals
• web UIs

But the goal for this task is to get to the minimal pipeline that works.