refactor: flatten padelnomics/padelnomics/ → repo root

git mv all tracked files from the nested padelnomics/ workspace
directory to the git repo root. Merged .gitignore files.
No code changes — pure path rename.

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

transform/sqlmesh_padelnomics/models/foundation/dim_cities.sql

@@ -0,0 +1,59 @@
+-- City dimension: canonical city records with population and venue count.
+-- Built from Eurostat Urban Audit codes joined to venue locations.
+-- Cities without Eurostat coverage (US, non-EU) are derived from venue clusters.
+
+MODEL (
+  name padelnomics.dim_cities,
+  kind FULL,
+  cron '@daily',
+  grain city_code
+);
+
+WITH -- Eurostat cities: latest population per city code
+eurostat_cities AS (
+  SELECT
+    city_code,
+    country_code,
+    population,
+    ref_year
+  FROM padelnomics.stg_population
+  QUALIFY ROW_NUMBER() OVER (PARTITION BY city_code ORDER BY ref_year DESC) = 1
+),
+-- Venue counts per (country_code, city) from dim_venues
+venue_counts AS (
+  SELECT
+    country_code,
+    city,
+    COUNT(*)  AS venue_count,
+    AVG(lat)  AS centroid_lat,
+    AVG(lon)  AS centroid_lon
+  FROM padelnomics.dim_venues
+  WHERE city IS NOT NULL AND city != ''
+  GROUP BY country_code, city
+),
+-- Eurostat city label mapping to canonical city names
+-- (Eurostat uses codes like DE001C → Berlin; we keep both)
+eurostat_labels AS (
+  SELECT DISTINCT
+    city_code,
+    country_code,
+    -- Derive a slug-friendly city name from the code as fallback
+    LOWER(REPLACE(city_code, country_code, ''))  AS city_slug_raw
+  FROM eurostat_cities
+)
+SELECT
+  ec.city_code,
+  ec.country_code,
+  COALESCE(vc.city, ec.city_code)               AS city_name,
+  LOWER(REGEXP_REPLACE(
+    COALESCE(vc.city, ec.city_slug_raw), '[^a-z0-9]+', '-'
+  ))                                             AS city_slug,
+  COALESCE(vc.centroid_lat, 0::DOUBLE)           AS lat,
+  COALESCE(vc.centroid_lon, 0::DOUBLE)           AS lon,
+  ec.population,
+  ec.ref_year                                    AS population_year,
+  COALESCE(vc.venue_count, 0)                    AS padel_venue_count
+FROM eurostat_cities ec
+LEFT JOIN venue_counts vc
+  ON  ec.country_code = vc.country_code
+  AND LOWER(TRIM(vc.city)) LIKE '%' || LOWER(LEFT(ec.city_code, 2)) || '%'