Add comprehensive tests for mentor repository and authentication

- Implemented tests for creating, retrieving, updating, and deleting mentors in `mentor_repository_test.rs`.
- Added tests for user authentication, including successful login, invalid email formats, and inactive users in `auth_login_tests.rs`.
- Created a mock test environment setup in `mock_test.rs` to facilitate database operations during tests.
- Updated module structure to include new test files for mentors and authentication.
- Ensured cleanup of the database after tests to maintain isolation and prevent side effects.

imphnen-entities/src/common_dto.rs

@@ -1,9 +1,5 @@
 use serde::{Deserialize, Serialize};
-use surrealdb::{
-	engine::local::Db,
-	engine::any::Any,
-	Surreal,
-};
+use surrealdb::{Surreal, engine::any::Any, engine::local::Db};
 use utoipa::{IntoParams, ToSchema};
 
 #[derive(Debug, Clone, Serialize, Deserialize, ToSchema)]

imphnen-entities/src/error_dto.rs

@@ -1,26 +1,31 @@
 pub mod error {
+	use axum::Json;
 	use axum::http::StatusCode;
 	use axum::response::IntoResponse;
 	use axum::response::Response;
-	use axum::Json;
 	use thiserror::Error;
 
 	#[derive(Error, Debug)]
 	pub enum Error {
-		#[error("database error")]
-		Db,
+		#[error("database error: {0}")]
+		Db(String),
 	}
 
 	impl IntoResponse for Error {
 		fn into_response(self) -> Response {
-			(StatusCode::INTERNAL_SERVER_ERROR, Json(self.to_string())).into_response()
+			let (status, error_message) = match self {
+				Error::Db(detail) => (
+					StatusCode::INTERNAL_SERVER_ERROR,
+					format!("Database error: {detail}"),
+				),
+			};
+			(status, Json(error_message)).into_response()
 		}
 	}
 
 	impl From<surrealdb::Error> for Error {
 		fn from(error: surrealdb::Error) -> Self {
-			eprintln!("{error}");
-			Self::Db
+			Self::Db(error.to_string())
 		}
 	}
 }