SRD 'Ready - Initiative Consequences of Readying': 'If you come to your next action and have not yet performed your readied action, you don't get to take the readied action (though you can ready the same action again).' _take_turn's start-of-turn block now clears state.readied/readied_trigger (logged 'ready expired'), before the policy call; the ready still survives the round boundary and can fire in the next round as long as the readier's own turn has not arrived. Updated the two tests that pinned the old infinite persistence and added cross-round fire + expiry tests.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
ctan