Let the strategy own the whole account; drop the unmanaged list

Every position is the strategy's: names it does not select, including ones
outside the index such as AAOI, are sold at the next rebalance, and sizing
uses the full NAV less the cash buffer. A position that is not a USD stock
cannot be traded as a SMART/USD order, so rebalance refuses to run while
one exists.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

config.toml

@@ -28,7 +28,3 @@ cash_buffer = 0.02      # fraction of NAV kept in cash
 resize_band = 0.10      # leave a held name alone while within 10% of its target value
 min_trade_value = 50.0  # skip trades below max(min_trade_value, min_trade_fraction * NAV);
 min_trade_fraction = 0.001  # full exits always trade
-# IBKR symbols rebalance never trades; their value is set aside before sizing. Every
-# other USD stock/ETF position is the strategy's and is sold once it is not selected,
-# including a name that has left the index.
-unmanaged = ["AAOI"]