feat(transform): add dim_locations + dual market scoring models

dim_locations (foundation):
- Seeded from stg_population_geonames (all locations, not venue-dependent)
- Grain: (country_code, geoname_id)
- Enriched with: padel venues within 5km, nearest court distance (ST_Distance_Sphere),
  tennis courts within 25km, country income
- Covers zero-court Gemeinden for opportunity scoring

location_opportunity_profile (serving) — Padelnomics Marktpotenzial-Score:
- Answers "Where should I build?" — no padel_venue_count filter
- Formula: population (25) + income (20) + supply gap inverted (30) +
           catchment gap (15) + tennis culture (10) = 100pts
- Sorted by opportunity_score DESC

city_market_profile (serving) — Padelnomics Marktreife-Score:
- Add saturation discount (×0.85 when venues_per_100k > 8)
- Update header comment to reference Marktreife-Score branding
- Kept WHERE padel_venue_count > 0 (established markets only)
- column name market_score unchanged (avoids downstream breakage)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

transform/sqlmesh_padelnomics/models/serving/city_market_profile.sql

@@ -1,11 +1,16 @@
 -- One Big Table: per-city padel market intelligence.
 -- Consumed by: SEO article generation, planner city-select pre-fill, API endpoints.
 --
--- Market score v2 (0–100):
---   30 pts  population  — log-scaled to 1M+ city ceiling (was 40pts/500K)
+-- Padelnomics Marktreife-Score v2 (0–100):
+-- Answers "How mature/established is this padel market?"
+-- Only computed for cities with ≥1 padel venue (padel_venue_count > 0).
+-- For white-space opportunity scoring, see serving.location_opportunity_profile.
+--
+--   30 pts  population  — log-scaled to 1M+ city ceiling
 --   25 pts  income PPS  — normalised to 200 ceiling (covers CH/NO/LU outliers)
 --   30 pts  demand      — observed occupancy if available, else venue density
 --   15 pts  data quality — completeness discount, not a market signal
+--   ×0.85   saturation  — discount when venues_per_100k > 8 (oversupplied market)
 
 MODEL (
   name serving.city_market_profile,
@@ -73,7 +78,11 @@ scored AS (
       -- Data quality (15 pts): measures completeness, not market quality.
       -- Reduced from 20pts — kept as confidence discount, not market signal.
       + 15.0 * data_confidence
-    , 1)                         AS market_score
+    , 1)
+    -- Saturation discount: venues_per_100k > 8 signals oversupply.
+    -- ~8/100K ≈ Spain-tier density; above this marginal return decreases.
+    * CASE WHEN venues_per_100k > 8 THEN 0.85 ELSE 1.0 END
+                                 AS market_score
   FROM base
 )
 SELECT

transform/sqlmesh_padelnomics/models/serving/location_opportunity_profile.sql

@@ -0,0 +1,69 @@
+-- Per-location padel investment opportunity intelligence.
+-- Consumed by: Gemeinde-level pSEO pages, opportunity map, "top markets" lists.
+--
+-- Padelnomics Marktpotenzial-Score (0–100):
+-- Answers "Where should I build a padel court?"
+-- Covers ALL GeoNames locations (pop ≥ 1K) — NOT filtered to existing padel markets.
+-- Zero-court locations score highest on supply gap component (white space = opportunity).
+--
+--   25 pts  addressable market — log-scaled population, ceiling 500K
+--           (opportunity peaks in mid-size cities; megacities already served)
+--   20 pts  economic power     — country income PPS, normalised to 200
+--   30 pts  supply gap         — INVERTED venue density; 0 courts/100K = full marks
+--   15 pts  catchment gap      — distance to nearest padel court (>30km = full marks)
+--   10 pts  sports culture     — tennis courts within 25km (≥10 = full marks)
+
+MODEL (
+  name serving.location_opportunity_profile,
+  kind FULL,
+  cron '@daily',
+  grain (country_code, geoname_id)
+);
+
+SELECT
+  l.geoname_id,
+  l.country_code,
+  l.country_name_en,
+  l.country_slug,
+  l.location_name,
+  l.location_slug,
+  l.lat,
+  l.lon,
+  l.admin1_code,
+  l.admin2_code,
+  l.population,
+  l.population_year,
+  l.median_income_pps,
+  l.income_year,
+  l.padel_venue_count,
+  l.padel_venues_per_100k,
+  l.nearest_padel_court_km,
+  l.tennis_courts_within_25km,
+  ROUND(
+    -- Addressable market (25 pts): log-scaled to 500K ceiling.
+    -- Lower ceiling than Marktreife (1M) — opportunity peaks in mid-size cities
+    -- that can support a court but aren't already saturated by large-city operators.
+    25.0 * LEAST(1.0, LN(GREATEST(l.population, 1)) / LN(500000))
+
+    -- Economic power (20 pts): country-level income PPS normalised to 200.
+    -- Drives willingness-to-pay for court fees (€20-35/hr target range).
+    + 20.0 * LEAST(1.0, COALESCE(l.median_income_pps, 100) / 200.0)
+
+    -- Supply gap (30 pts): INVERTED venue density.
+    -- 0 courts/100K = full 30 pts (white space); ≥4/100K = 0 pts (served market).
+    -- This is the key signal that separates Marktpotenzial from Marktreife.
+    + 30.0 * GREATEST(0.0, 1.0 - COALESCE(l.padel_venues_per_100k, 0) / 4.0)
+
+    -- Catchment gap (15 pts): distance to nearest existing padel court.
+    -- >30km = full 15 pts (underserved catchment area).
+    -- NULL = no courts found anywhere (rare edge case) → neutral 0.5.
+    + 15.0 * COALESCE(LEAST(1.0, l.nearest_padel_court_km / 30.0), 0.5)
+
+    -- Sports culture proxy (10 pts): tennis courts within 25km.
+    -- ≥10 courts = full 10 pts (proven racket sport market = faster padel adoption).
+    -- 0 courts = 0 pts. Many new padel courts open inside existing tennis clubs.
+    + 10.0 * LEAST(1.0, l.tennis_courts_within_25km / 10.0)
+  , 1)                                                                   AS opportunity_score,
+  CURRENT_DATE                                                           AS refreshed_date
+FROM foundation.dim_locations l
+ORDER BY opportunity_score DESC