feat: add model run comparison

apps/api/migrations/202606240005_area_score_snapshots.sql

@@ -0,0 +1,34 @@
+CREATE TABLE IF NOT EXISTS gold.area_score_snapshots (
+    model_run_id BIGINT NOT NULL REFERENCES gold.model_runs(model_run_id) ON DELETE CASCADE,
+    area_id TEXT NOT NULL REFERENCES silver.areas(area_id),
+    name TEXT NOT NULL,
+    district TEXT NOT NULL,
+    segment TEXT NOT NULL,
+    month TEXT NOT NULL CHECK (month ~ '^[0-9]{4}-[0-9]{2}$'),
+    investment_score DOUBLE PRECISION NOT NULL CHECK (investment_score BETWEEN 0 AND 100),
+    recommendation TEXT NOT NULL,
+    liquidity_score DOUBLE PRECISION NOT NULL CHECK (liquidity_score BETWEEN 0 AND 100),
+    momentum_score DOUBLE PRECISION NOT NULL CHECK (momentum_score BETWEEN 0 AND 100),
+    rent_support_score DOUBLE PRECISION NOT NULL CHECK (rent_support_score BETWEEN 0 AND 100),
+    safety_margin_score DOUBLE PRECISION NOT NULL CHECK (safety_margin_score BETWEEN 0 AND 100),
+    credit_support_score DOUBLE PRECISION NOT NULL CHECK (credit_support_score BETWEEN 0 AND 100),
+    supply_risk_score DOUBLE PRECISION NOT NULL CHECK (supply_risk_score BETWEEN 0 AND 100),
+    valuation_pressure_score DOUBLE PRECISION NOT NULL CHECK (valuation_pressure_score BETWEEN 0 AND 100),
+    transaction_count INTEGER NOT NULL CHECK (transaction_count >= 0),
+    transaction_price_psm DOUBLE PRECISION NOT NULL CHECK (transaction_price_psm >= 0),
+    listing_count INTEGER NOT NULL CHECK (listing_count >= 0),
+    listing_price_psm DOUBLE PRECISION NOT NULL CHECK (listing_price_psm >= 0),
+    rent_price_psm DOUBLE PRECISION NOT NULL CHECK (rent_price_psm >= 0),
+    median_days_on_market DOUBLE PRECISION NOT NULL CHECK (median_days_on_market >= 0),
+    annual_rent_yield_pct DOUBLE PRECISION NOT NULL CHECK (annual_rent_yield_pct >= 0),
+    listing_pressure_ratio DOUBLE PRECISION NOT NULL CHECK (listing_pressure_ratio >= 0),
+    discount_pct DOUBLE PRECISION NOT NULL,
+    price_momentum_pct DOUBLE PRECISION NOT NULL,
+    volume_momentum_pct DOUBLE PRECISION NOT NULL,
+    model_version TEXT NOT NULL,
+    computed_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    PRIMARY KEY (model_run_id, area_id)
+);
+
+CREATE INDEX IF NOT EXISTS idx_area_score_snapshots_month
+    ON gold.area_score_snapshots(month, investment_score DESC);