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/geo/add_basemap_with_timeout.py

@@ -0,0 +1,57 @@
+"""Add an OSM basemap with a SIGALRM-based timeout (Unix only)."""
+
+from __future__ import annotations
+
+import signal
+from pathlib import Path
+
+
+def add_basemap_with_timeout(
+    ax: "Axes",
+    zoom: int = 9,
+    cache_dir: "str | Path | None" = None,
+    timeout_s: float = 15.0,
+) -> bool:
+    """Add an OpenStreetMap basemap with a hard timeout (Unix only).
+
+    Uses SIGALRM to enforce a wall-clock timeout on the tile fetch. If the
+    download does not complete within ``timeout_s`` seconds the function
+    returns False without modifying the Axes further.
+
+    **Unix only** — SIGALRM is not available on Windows. On Windows this
+    function always returns False immediately.
+
+    Args:
+        ax: matplotlib Axes with projected extent (EPSG:3857).
+        zoom: Tile zoom level (1–19).
+        cache_dir: Optional tile cache directory.
+        timeout_s: Maximum seconds to wait for tiles. Default 15.0.
+
+    Returns:
+        True if the basemap was added successfully; False on timeout or error.
+    """
+    if not hasattr(signal, "SIGALRM"):
+        # Windows — SIGALRM not available
+        return False
+
+    try:
+        import contextily as ctx  # type: ignore
+    except ImportError:
+        return False
+
+    def _handler(signum: int, frame: object) -> None:  # noqa: ARG001
+        raise TimeoutError("basemap fetch timed out")
+
+    old_handler = signal.signal(signal.SIGALRM, _handler)
+    signal.setitimer(signal.ITIMER_REAL, timeout_s)
+
+    try:
+        if cache_dir is not None:
+            ctx.set_cache_dir(str(cache_dir))
+        ctx.add_basemap(ax, source=ctx.providers.OpenStreetMap.Mapnik, zoom=zoom)
+        return True
+    except Exception:  # noqa: BLE001
+        return False
+    finally:
+        signal.setitimer(signal.ITIMER_REAL, 0)
+        signal.signal(signal.SIGALRM, old_handler)