Added guard in jail turn handler to skip rolling when in_trade is True.
The roll happens later when '-- Command:' arrives after trade completes.
Added 5 regression tests for the exact failing sequence.
- Handle 'Which player do you wish to trade with?' prompt when
in_trade is True (was silently returning, causing bot to roll
during an active trade prompt)
- Simplify property trade offers to always say 'done' (cash-only
trades) to avoid getting stuck on property list prompts
