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Author SHA1 Message Date
2580158d8c fix(tradein/estimator): lock honest asking_to_sold_ratio invariant + disambiguate torg bases (#2087 M2/M3) (#2387)
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2026-07-04 06:48:51 +00:00
ecc3ab5aab fix(tradein/estimator): честный asking_to_sold_ratio — бейдж «−N% к рынку» больше не врёт
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Оценщик клиента жаловался на «большой интервал между рекомендованной ценой
и оценкой». Разбор: бейдж «−23% к рынку» (web HeroSummary + PDF, формула
round((1−ratio)×100)) систематически завышал скидку.

Root cause: сохранённый asking_to_sold_ratio — это СЫРОЙ per-rooms/tier дисконт
из ratio_resolver, но фактический expected_sold сдвинут относительно median×ratio
последующими корректировками: hedonic year+area (#2002, factor ∈ [0.75, 1.30], ON
by default), le_asking-clamp и corridor-clamp. Пример с прода (451de30b): median
7.75M × raw 0.771 = 5.97M, hedonic ×1.226 → expected_sold 7.32M — но stored ratio
остался 0.771, тогда как фактическое expected_sold/median = 0.945. Бейдж показывал
«−23%» вместо честных «−5%».

Fix: после финализации expected_sold пересчитываем сохранённый asking_to_sold_ratio
как реальное expected_sold_price/median_price (честный дескриптор). Сам expected_sold
(выкуп) НЕ трогаем — hedonic-uplift остаётся прибит к sale-модели, buyout не падает
до наивного median×raw. Порог _RATIO_DESCRIPTOR_EPS=1e-4 отсекает шум округления:
без сдвига (hedonic OFF, нет клампа) табличный ratio сохраняется байт-в-байт →
регрессия на не-зажатых оценках отсутствует.

Стор asking_to_sold_ratio — чисто ДЕСКРИПТОР (web/PDF/history badge), НЕ калибровочный
вход: калибровочный ratio живёт в таблице asking_to_sold_ratios (refresh-task, читает
resolver) — не тронута. Backtest #1966 скорит expected_sold_per_m2 (не stored ratio) —
не затронут (expected_sold без изменений).

Tests: 3 новых в test_estimator_price_spine.py (инвариант при hedonic-uplift +
corridor-clamp; byte-identical регрессия без сдвига); поправлен
test_global_fallback_basis_carried_through (hedonic OFF для сырого ratio).
Full suite: 2749 passed (кроме pre-existing test_search_cache_hit).

Refs #2141
2026-07-02 18:26:19 +03:00
c45445b726 feat(tradein/estimator): hedonic year+area correction on expected_sold (#2002)
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2026-06-27 16:06:08 +00:00
2ea49b637f refactor(tradein/estimator): extract deterministic pricing into pure _price_from_inputs (#1966 foundation)
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Behavior-preserving structural refactor: the ~870-line deterministic pricing
block inside estimate_quality() is extracted into a new pure synchronous function
_price_from_inputs() returning a PricingResult dataclass.

Key design decisions:
- All async DB fetches (imv_eval, yandex_val, cian_val) hoisted to estimate_quality
  BEFORE the call; passed as pre-fetched values / bool flags.
- DB-dependent helpers whose arguments are computed inside the block (_get_asking_sold_ratio,
  _lookup_quarter_index, _lookup_quarter_indexes) injected as Callable parameters
  (ratio_resolver, quarter_index_lookup, quarter_indexes_lookup).
- _fetch_house_imv_anchor called once in estimate_quality (was two separate conditional
  calls inside the block); single result passed as imv_anchor dict.
- _fetch_dkp_corridor and _fetch_anchor_comps hoisted to estimate_quality with
  identical guards.

All 2443 existing tests pass UNMODIFIED. 9 new hermetic unit tests added that
call _price_from_inputs directly with stub callables.
2026-06-27 13:00:21 +03:00