Refactored CadencePolicy.active_start_hour/active_end_hour into a tuple
of (start, end) hour pairs so additional regional windows can be added
without code changes. Default keeps EU/US-only behaviour identical.
The Asia window (00:00-08:00 UTC — Tokyo + HK + Shanghai) is included
as a commented-out tuple in the dataclass default. Uncomment one line
to enable hourly AI cadence during the Asia session as well.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>