feat(forecasting): §9.x→§22 orchestrator + fix supply-side district resolution (3a)
Add build_site_finder_report (orchestrator.py): computes the §9.x layers (market
metrics, supply layers, future-supply pressure, demand/supply forecast, scenarios,
score card, special indices, recommendation overlay) with their heterogeneous
signatures and feeds the PURE assemble_report → §22 SiteFinderReport. Default segment
= modal competitor class; each §9.x call _safe_call-wrapped (graceful). Standalone —
no endpoint/Celery/persistence (that is 3b).
Prod ground-truth of the orchestrator surfaced a false-BUY bug: future_supply
(compute_future_supply_pressure) read the mixed-vocab persisted view
v_supply_layers_latest by a SCALAR admin district_name, missing all Layer-1
micro-keyed rows → admin parcel (Кировский) got supply=0 → false +1.0 deficit →
'Строить: недонасыщен' headline despite ~45k competing units. Fix: resolve
admin→micros, filter district_name = ANY(CAST(:names AS text[])) where names =
micros (L1) + admin (L2/L3), with :has_district EKB-wide guard (extends PR #1054's
resolver to the persisted-view path it missed). future_supply is the only
v_supply_layers_latest consumer on the forecast path (verified).
Prod after: Кировский supply 0→~42953, deficit +1.0→−1.0 (honest oversupply),
MOI 0→116.6, false-BUY headline gone, overall 0.734→0.42. 80 module tests pass
(signature-trap + resolver-regression guards genuine); ruff clean. Refs #961 #969.