refactor: Remove unused variables and add dead code allowances for better clarity

shared/common/src/ai.rs

@@ -117,6 +117,7 @@ pub fn get_model_for_task(task: &str) -> String {
 }
 
 /// Crear un cliente reqwest que acepte certificados inválidos (para desarrollo con certificados autofirmados)
+#[allow(dead_code)]
 fn create_insecure_client() -> Result<reqwest::Client, AiError> {
     reqwest::Client::builder()
         .danger_accept_invalid_certs(true)

shared/common/src/models.rs

@@ -1182,6 +1182,7 @@ pub struct PublicProfile {
 #[derive(Debug, Serialize, Deserialize, sqlx::Type, Clone, PartialEq)]
 #[sqlx(type_name = "course_level", rename_all = "lowercase")]
 #[serde(rename_all = "lowercase")]
+#[allow(non_camel_case_types)]
 pub enum CourseLevel {
     Beginner,
     Beginner_1,