Tier A (same building) dropped cian listings tagged listing_segment='novostroyki'
even in delivered buildings where that tag marks owner resales/переуступки
(sale_type=free). Gated relaxation of the #1186 guard, Tier A ONLY: include
novostroyki rows iff the same house has secondary (vtorichka/NULL) listings AND
secondary_count >= primary_count — secondary-dominant signal of a delivered house.
Prevents a lone vtorichka + clustered developer-priced novostroyki from anchoring
on застройщик prices after MAD-clip drops the rare secondary (~27% overvaluation).
Pure-primary / primary-dominated houses keep the #1186 guard. Behind
estimate_sb_tier_a_allow_primary_if_secondary_present (default True).
Dedup duplicate active rows by (source, source_id) primary key (codebase canon,
namespaced id/url tags, source_url fallback) — collapses rows whose source_url
differs only by trailing slash / query-param (e.g. cian source_id=330047129 ×2).
Tier C / radius / asking_to_sold_ratio paths untouched. 84 unit tests pass.
- Удалён параметр listing_segment: str | None = None из сигнатуры _fetch_anchor_comps
(guard хардкожен в SQL-блоках Tier A/C, параметр не использовался)
- Убраны seg_counts / target_segment в caller-блоке SAME-BUILDING ANCHOR (~L2174)
- Docstring Tier C обновлён: «вторичка-канон guard (#1186): NULL = legacy вторичка»
- test_segment_guard_1186.py: добавлены 4 негативных assert'а:
· no bare = 'vtorichka' без IS NULL OR
· no deprecated <> / != 'novostroyki' form
· _fetch_anchor_comps не содержит listing_segment в сигнатуре
· Tier C не использует CAST(:segment AS text) (параметрическую форму)
