fix: supply gap inflation + inline map data + guard API endpoints

A. location_profiles.sql: supply gap now uses GREATEST(catchment_padel_courts,
   COALESCE(city_padel_venue_count, 0)) so Playtomic venues prevent cities like
   Murcia/Cordoba/Gijon from receiving a full 30-pt supply gap bonus when their
   OSM catchment count is zero. Expected ~10-15 pt drop for affected ES cities.

B. pseo_country_overview.sql: add population-weighted lat/lon centroid columns
   so the markets map can use accurate country positions from this table.

C/D. content/routes.py + markets.html: query pseo_country_overview in the route
   and pass as map_countries to the template, replacing the fetch('/api/...') call
   with inline JSON. Map scores now match pseo_country_overview (pop-weighted),
   and the page loads without an extra round-trip.

E. api.py: add @login_required to all 4 endpoints. Unauthenticated callers get
   a 302 redirect to login instead of data.

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

transform/sqlmesh_padelnomics/models/serving/pseo_country_overview.sql

@@ -37,6 +37,8 @@ SELECT
   -- Use the most common currency in the country (MIN is deterministic for single-currency countries)
   MIN(price_currency)                                            AS price_currency,
   SUM(population)                                                AS total_population,
+  ROUND(SUM(lat * population) / NULLIF(SUM(population), 0), 4)  AS lat,
+  ROUND(SUM(lon * population) / NULLIF(SUM(population), 0), 4)  AS lon,
   CURRENT_DATE                                                   AS refreshed_date
 FROM serving.pseo_city_costs_de
 GROUP BY country_code, country_name_en, country_slug