fix: resolve all clippy warnings and convert integration_tests to custom cfg

- Add type aliases (FileRow, FolderRow, FolderRowPaginated, FolderRowOptUser) to reduce type complexity
- Simplify redundant closures in app_password_handler and webdav_handler
- Remove needless borrow in auth_handler
- Collapse nested if/let chains in login_lockout, webdav_lock, auth, rate_limit
- Box LockEntry in acquire() Err variant to fix large enum variant warning
- Rename DeviceCodeStatus::from_str to parse to avoid should_implement_trait lint
- Add #[allow(clippy::too_many_arguments)] and #[allow(clippy::result_unit_err)] where appropriate
- Convert integration_tests from cargo feature to custom cfg attribute
- Add check-cfg lint config in Cargo.toml for integration_tests cfg

src/interfaces/api/handlers/folder_handler.rs

@@ -13,13 +13,13 @@ use tokio_util::io::ReaderStream;
 use crate::application::dtos::folder_dto::{CreateFolderDto, MoveFolderDto, RenameFolderDto};
 use crate::application::dtos::folder_listing_dto::FolderListingDto;
 use crate::application::dtos::pagination::PaginationRequestDto;
+use crate::application::ports::file_ports::FileRetrievalUseCase;
 use crate::application::ports::inbound::FolderUseCase;
+use crate::application::ports::trash_ports::TrashUseCase;
 use crate::application::services::folder_service::FolderService;
 use crate::common::di::AppState as GlobalAppState;
 use crate::common::errors::ErrorKind;
 use crate::interfaces::middleware::auth::AuthUser;
-use crate::application::ports::file_ports::FileRetrievalUseCase;
-use crate::application::ports::trash_ports::TrashUseCase;
 
 type AppState = Arc<FolderService>;