feat: Translate various strings and comments to Spanish for better localization

- Updated error messages and comments in main.rs, openapi.rs, portfolio.rs, predictive.rs, ai.rs, health.rs, middleware.rs, models.rs, token_limits.rs, and webhooks.rs to Spanish.
- Enhanced user experience by providing localized content for Spanish-speaking users.

shared/common/src/health.rs

@@ -1,11 +1,11 @@
-//! Health check endpoints for monitoring and observability
+//! Endpoints de verificación de salud para monitoreo y observabilidad
 
 use axum::{Json, Router, routing::get, extract::State};
 use serde_json::json;
 use sqlx::PgPool;
 use std::time::Instant;
 
-/// Health check state shared across requests
+/// Estado de verificación de salud compartido entre peticiones
 #[derive(Clone)]
 pub struct HealthState {
     pub start_time: Instant,
@@ -21,7 +21,7 @@ impl Default for HealthState {
     }
 }
 
-/// Basic health check endpoint
+/// Endpoint básico de verificación de salud
 pub async fn health_check() -> Json<serde_json::Value> {
     Json(json!({
         "status": "healthy",
@@ -29,7 +29,7 @@ pub async fn health_check() -> Json<serde_json::Value> {
     }))
 }
 
-/// Detailed readiness check including database connectivity
+/// Verificación detallada de disponibilidad que incluye la conectividad con la base de datos
 pub async fn readiness_check(pool: PgPool) -> Json<serde_json::Value> {
     let db_status = match pool.acquire().await {
         Ok(_) => "connected",
@@ -45,7 +45,7 @@ pub async fn readiness_check(pool: PgPool) -> Json<serde_json::Value> {
     }))
 }
 
-/// Liveness check with uptime information
+/// Verificación de vitalidad (liveness) con información de tiempo de actividad (uptime)
 pub async fn liveness_check(state: State<HealthState>) -> Json<serde_json::Value> {
     let uptime = state.start_time.elapsed();
 
@@ -57,7 +57,7 @@ pub async fn liveness_check(state: State<HealthState>) -> Json<serde_json::Value
     }))
 }
 
-/// Create health routes
+/// Crear rutas de salud
 pub fn health_routes(pool: PgPool) -> Router<HealthState> {
     Router::new()
         .route("/health", get(health_check))