Intelligent handling when tomorrow's price data arrives:
1. Cross-Day Extension
- Late-night periods (starting ≥20:00) can extend past midnight
- Extension continues while prices remain below daily_min × (1+flex)
- Maximum extension to 08:00 next day (covers typical night low)
2. Period Supersession
- Obsolete late-night today periods filtered when tomorrow is better
- Tomorrow must be ≥10% cheaper to supersede (SUPERSESSION_PRICE_IMPROVEMENT_PCT)
- Prevents stale relaxation periods from persisting
Impact: Late-night periods reflect tomorrow's data when available.
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