feat: extraccion masiva footprint_aurgi (41 funcs + 4 types + stack Docker geo)

Extrae al registry funciones del proyecto interno footprint_aurgi:
- core (6): slugify_ascii, normalize_for_join, cp_provincia_es, infer_provincia_from_cp, safe_read_csv_fallback, csv_to_parquet_duckdb
- geo puras (7): haversine_km, point_in_ring, point_in_polygon, point_in_polygons_bbox, polygon_bbox, extent_with_padding, distance_bucket
- geo I/O (4): load_geojson_polygons, load_boundary_gdf, add_basemap_osm, add_basemap_with_timeout
- valhalla client (4): valhalla_route, valhalla_isochrone, valhalla_isochrones_async, valhalla_matrix_1_to_n
- datascience stats (7): trimmed_mean, geometric_mean, detect_distribution_type, best_central_tendency, summary_stats, kde_density_levels, alpha_shape_concave_hull
- datascience fuzzy (3): fuzzy_merge_adaptive (rapidfuzz), words_to_dataset, remove_words_from_column
- datascience viz (2): plot_kde_2d, plot_heatmap_log
- infra (4): compress_pdf_ghostscript, render_table_page_pdfpages, add_header_logo, osm2pgsql_ingest
- pipelines (4): setup_geo_stack_docker, compute_centers_reachability, generate_isochrones_by_zone, count_points_per_zone
- types geo (4): LonLat, BBox, IsochroneRequest, Centro

Incluye:
- apps/footprint_geo_stack/ (PostGIS + Martin + Valhalla via docker-compose)
- 131/132 tests pasan (1 skip esperado: osm2pgsql en PATH)
- Issue tracker dev/issues/0052-footprint-aurgi-extraction.md
- Atribucion uniforme: source_repo internal:footprint_aurgi, source_license internal-aurgi
- Build con 9 agentes en paralelo (8 wave 1 + 1 wave 2 pipelines)

Tambien commitea trabajo previo no commiteado: aggregate_extraction_results, chunk_with_overlap, clean_pdf_text, merge_entity_aliases, extract_graph_gliner2, extract_relations_mrebel, extract_triples_spacy_es, gliner2/mrebel/marianmt/rebel/spacy_es load_model, parse_rebel_output, translate_es_to_en, issue 0050/0051.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

python/functions/datascience/kde_density_levels.md

@@ -0,0 +1,52 @@
+---
+id: kde_density_levels_py_datascience
+name: kde_density_levels
+kind: function
+lang: py
+domain: datascience
+version: "1.0.0"
+purity: pure
+signature: "def kde_density_levels(xs: list[float], ys: list[float], bw_adjust: float = 0.6, abs_quantile: float = 0.1, dense_quantile: float = 0.85, bins: int = 80) -> dict | None"
+description: "Estimates 2-D density via KDE (scipy) or histogram fallback (numpy) and returns per-point density values plus absolute and dense quantile thresholds."
+tags: [statistics, kde, density, spatial, geospatial, scipy, numpy]
+uses_functions: []
+uses_types: []
+returns: []
+returns_optional: false
+error_type: ""
+imports: [numpy, scipy]
+example: |
+  from kde_density_levels import kde_density_levels
+  import numpy as np
+  rng = np.random.default_rng(42)
+  result = kde_density_levels(rng.normal(0,1,50).tolist(), rng.normal(0,1,50).tolist())
+  # {"method": "kde", "densities": array(...), "abs_level": ..., "dense_level": ...}
+tested: true
+tests:
+  - "test_kde_density_levels_returns_dict_for_50_points"
+  - "test_kde_density_levels_none_for_few_points"
+  - "test_kde_density_levels_none_for_4_points"
+  - "test_kde_density_levels_levels_ordered"
+  - "test_kde_density_levels_mismatched_lengths"
+test_file_path: "python/functions/datascience/tests/test_kde_density_levels.py"
+file_path: "python/functions/datascience/kde_density_levels.py"
+params:
+  - name: xs
+    desc: "X-coordinates of the 2-D point cloud."
+  - name: ys
+    desc: "Y-coordinates of the 2-D point cloud. Must have same length as xs."
+  - name: bw_adjust
+    desc: "Bandwidth adjustment factor for gaussian_kde. Default 0.6."
+  - name: abs_quantile
+    desc: "Quantile of density values used as the absolute (sparse) threshold. Default 0.1."
+  - name: dense_quantile
+    desc: "Quantile of density values used as the dense cluster threshold. Default 0.85."
+  - name: bins
+    desc: "Number of bins per axis for the histogram fallback. Default 80."
+output: "Dict with method (str), densities (np.ndarray of per-point density), abs_level (float), dense_level (float). Returns None if len(xs) < 5 or lengths differ."
+source_repo: "internal:footprint_aurgi"
+source_license: "internal-aurgi"
+source_file: "ponderacion_isochronas/src/recomendador_centros.py:305"
+---
+
+Funcion pura que no escribe nada en disco. returns_optional=true porque devuelve None cuando hay menos de 5 puntos.