feat: funciones Python para API Metabase

Añade módulo Python con funciones para la API de Metabase en dominio infra.
Incluye cliente HTTP, auth, y CRUD de cards, dashboards y users.
Proyecto gestionado con uv (pyproject.toml).

python/functions/metabase/metabase_execute_card.md

@@ -0,0 +1,34 @@
+---
+name: metabase_execute_card
+kind: function
+lang: py
+domain: infra
+version: "1.0.0"
+purity: impure
+signature: "def metabase_execute_card(client: MetabaseClient, card_id: int, parameters: list[dict] | None = None) -> dict"
+description: "Ejecuta la query de una card guardada y retorna resultados con columnas y filas. Soporta parametros. Endpoint: POST /api/card/:id/query."
+tags: [metabase, card, question, execute, query, api, python]
+uses_functions: []
+uses_types: []
+returns: []
+returns_optional: false
+error_type: "error_go_core"
+imports: [httpx]
+tested: false
+tests: []
+test_file_path: ""
+file_path: "python/functions/metabase/cards.py"
+---
+
+## Ejemplo
+
+```python
+result = metabase_execute_card(client, 42)
+for row in result["data"]["rows"]:
+    print(row)
+```
+
+## Notas
+
+Respuesta: status, row_count, running_time, data.columns, data.rows, data.cols.
+Limite default: 2000 filas. Para ad-hoc sin card usar metabase_execute_query.