release: ephemeris + day-type calendar features#348
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Two opt-in, deterministic, leakage-free calendar feature blocks (default off → byte-identical baseline), implementing chapter-16 "adopt next" #1 ephemeris and #2 day-type. - get_ephemeris_features (calendar/features.py): continuous solar geometry the hour-of-day RBFs only encode implicitly — per-hour solar_elevation, exact daylight_duration_h, and signed hours_since_sunrise / hours_to_sunset. Pure astral (already a dep), no network, no leakage. Refs xieh18a, lope20a. - create_day_type_df / get_day_type_features (calendar/holiday.py): is_workday plus an integer day_type class (workday/Saturday/Sunday/public-holiday, with holiday precedence) from pure calendar arithmetic. Ref ziel18a. - ConfigMulti: include_ephemeris_features, include_day_type_features; wired in BaseTask.build_exogenous_features (steps 4c-bis / 4e), getattr-guarded. Note: school-holiday-per-Bundesland (also in #2) deferred — needs a bundled static dataset; tracked as a further step in the KB. Tests: 13 new (correctness, determinism, seasonal/holiday edge cases). Suite 2412 passed, coverage 72.0%; calendar/features 100%, calendar/holiday 96%. Docs reference regenerated. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Promotes #347 (feat(calendar): ephemeris solar-geometry + day-type refinement). Expected bump: minor → 19.3.0. All develop CI green. 🤖 Generated with Claude Code