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-iam/src/v1/roles/roles_dto.rs

@@ -64,3 +64,16 @@ pub struct RolesDetailQueryDto {
 	pub created_at: Option<String>,
 	pub updated_at: Option<String>,
 }
+
+impl Default for RolesDetailQueryDto {
+	fn default() -> Self {
+		Self {
+			id: Thing::from(("".to_string(), surrealdb::sql::Id::Number(0))),
+			name: String::new(),
+			permissions: Vec::new(),
+			is_deleted: false,
+			created_at: None,
+			updated_at: None,
+		}
+	}
+}