feat: funciones infra — Docker, deploy, build y health check

Funciones impuras para gestión de contenedores: docker_build_image,
docker_compose_up/down, docker_volume_create/list/remove,
generate_dockerfile, write_dockerfile, go_build_binary, health_check_http,
deploy_app y stop_app. Todas con tests unitarios donde aplica.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

functions/infra/docker_compose_up.md

@@ -0,0 +1,35 @@
+---
+name: docker_compose_up
+kind: function
+lang: go
+domain: infra
+version: "1.0.0"
+purity: impure
+signature: "func DockerComposeUp(composeFile string, detach bool) (string, error)"
+description: "Levanta un stack docker-compose desde el archivo dado. Si detach es true ejecuta en background (-d). Retorna el stdout del comando."
+tags: [docker, compose, up, infra]
+uses_functions: []
+uses_types: []
+returns: []
+returns_optional: false
+error_type: "error_go_core"
+imports: [fmt, os/exec, strings]
+tested: true
+tests: ["detach true agrega flag -d al comando", "error si composeFile no existe"]
+test_file_path: "functions/infra/docker_compose_up_test.go"
+file_path: "functions/infra/docker_compose_up.go"
+---
+
+## Ejemplo
+
+```go
+out, err := DockerComposeUp("./docker-compose.yml", true)
+if err != nil {
+    log.Fatal(err)
+}
+fmt.Println(out)
+```
+
+## Notas
+
+Ejecuta `docker compose -f composeFile up [-d]`. Usa el subcomando `docker compose` (V2), no el binario standalone `docker-compose`. Retorna stdout + stderr combinados para facilitar el debugging. En modo no-detach bloquea hasta que el compose termine (util para stacks efimeros).