Fix the @return NatSpec for recenter() isUp: the previous description
was wrong for the token0=WETH ordering (claimed tick above center, but
the actual check is currentTick < centerTick when token0isWeth). The
correct invariant is isUp=true ↔ KRK price in ETH rose (buy event /
net ETH inflow), regardless of token ordering.
Also address review nit: StrategyExecutor._logRecenter() now logs
'direction=BOOTSTRAP' instead of 'direction=DOWN' when no anchor
position existed before the recenter (aLiqPre==0), eliminating the
misleading directional label on the first recenter.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
54976184bc