Function initialize_position_tracking 

pub async fn initialize_position_tracking(
    client: &Arc<Client>,
    ib_account: Ustr,
    position_tracker: PositionTracker,
) -> Result<Vec<Contract>>

Initialize position tracking with existing positions.

This fetches all current positions and initializes the position tracker to avoid processing duplicates from execDetails. Returns the contracts of the tracked positions so their instruments can be published before reconciliation.

Errors

Returns an error if position request fails.