fix(eda): bugs de bajo riesgo del benchmark (H1,H5,H12,H13,H14) + tests faltantes

- H1: render_eda_markdown ya no aplica doble x100 a outlier_pct (336% -> real)
- H5: profile_database filtra base_tables_only (excluye VIEWs; sakila 21->16)
- H12: suggest_reexpression salta columnas no-continuas
- H13: to_returns/profile_table elige retornos (financiera) vs diferencias (fisica)
- H14: test de regresion ATTACH sqlite via information_schema
- +8 tests de las funciones eda nuevas (acf_pacf, adf_kpss, ...). 77 tests verdes
- L/M (H2,H3,H4,H6,H7,H8,H9,H10,H11) quedan en issues 0174-0177 para revision

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

python/functions/pipelines/profile_database_test.py

@@ -78,6 +78,77 @@ def test_profile_database_two_related_tables():
         assert res["report_json_path"] is None
 
 
+def test_profile_database_excluye_views(tmp_path):
+    # Regresión H5: una VIEW no es una tabla real. profile_database debe perfilar
+    # solo las BASE TABLE y no contar las VIEWs (inflan n_tables y multiplican FK
+    # falsas, al ser copias de columnas de las tablas base).
+    db_path = os.path.join(str(tmp_path), "withviews.duckdb")
+    _build_related_db(db_path)
+    con = duckdb.connect(db_path)
+    con.execute("CREATE VIEW customers_v AS SELECT id, name FROM customers")
+    con.execute("CREATE VIEW orders_v AS SELECT order_id, total FROM orders")
+    con.close()
+
+    res = profile_database(db_path, write_report=False)
+
+    assert res["status"] == "ok", res
+    prof = res["db_profile"]
+    # Solo las 2 tablas base; las 2 views quedan fuera.
+    assert prof["n_tables"] == 2
+    profiled = {tp["table"] for tp in prof["table_profiles"]}
+    assert profiled == {"customers", "orders"}
+    assert "customers_v" not in profiled
+    assert "orders_v" not in profiled
+
+
+def test_profile_database_attach_sqlite_no_usa_sqlite_master(tmp_path):
+    # Regresión H14: materializar una base SQLite vía ATTACH (information_schema,
+    # no sqlite_master) y perfilarla con profile_database sin que falle. Blinda el
+    # bug original 'sqlite_master does not exist'.
+    import sqlite3
+
+    sqlite_path = os.path.join(str(tmp_path), "shop.sqlite")
+    sconn = sqlite3.connect(sqlite_path)
+    sconn.execute("CREATE TABLE customers (id INTEGER PRIMARY KEY, name TEXT)")
+    sconn.execute("INSERT INTO customers VALUES (1,'Ana'),(2,'Luis'),(3,'Marta')")
+    sconn.execute(
+        "CREATE TABLE orders (order_id INTEGER, customer_id INTEGER, total REAL)"
+    )
+    sconn.execute(
+        "INSERT INTO orders VALUES (10,1,99.5),(11,2,12.0),(12,3,7.25),(13,1,5.0)"
+    )
+    sconn.execute("CREATE VIEW big_orders AS SELECT * FROM orders WHERE total > 10")
+    sconn.commit()
+    sconn.close()
+
+    ddb_path = os.path.join(str(tmp_path), "shop_mat.duckdb")
+    con = duckdb.connect(ddb_path)
+    con.execute("INSTALL sqlite")
+    con.execute("LOAD sqlite")
+    con.execute(f"ATTACH '{sqlite_path}' AS src (TYPE sqlite)")
+    rows = con.execute(
+        "SELECT table_name FROM information_schema.tables "
+        "WHERE table_catalog='src' AND table_type='BASE TABLE' "
+        "AND table_name NOT LIKE 'sqlite_%'"
+    ).fetchall()
+    for (name,) in rows:
+        con.execute(f'CREATE TABLE "{name}" AS SELECT * FROM src."{name}"')
+    con.execute("DETACH src")
+    con.close()
+
+    res = profile_database(ddb_path, write_report=False)
+    assert res["status"] == "ok", res
+    prof = res["db_profile"]
+    # Solo las 2 tablas base materializadas (la VIEW no se materializó).
+    profiled = {tp["table"] for tp in prof["table_profiles"]}
+    assert profiled == {"customers", "orders"}
+    # FK orders.customer_id -> customers.id detectable.
+    assert any(
+        fk.get("from_table") == "orders" and fk.get("to_table") == "customers"
+        for fk in prof["fk_candidates"]
+    ), prof["fk_candidates"]
+
+
 def test_profile_database_writes_report(tmp_path):
     db_path = os.path.join(str(tmp_path), "shop2.duckdb")
     _build_related_db(db_path)