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/middleware.rs

@@ -28,7 +28,7 @@ pub async fn org_extractor_middleware(
     let token = if let Some(token_str) = auth_header.and_then(|s: &str| s.strip_prefix("Bearer ")) {
         token_str.to_string()
     } else {
-        // Check for preview_token in query string
+        // Verificar si hay preview_token en la cadena de consulta
         let query = req.uri().query().unwrap_or_default();
         let preview_token = query
             .split('&')