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/wopi_handler.rs

@@ -20,10 +20,10 @@ use axum::{
 use serde::{Deserialize, Serialize};
 use std::sync::Arc;
 
+use crate::application::ports::file_ports::{FileRetrievalUseCase, FileUploadUseCase};
 use crate::application::services::wopi_lock_service::WopiLockService;
 use crate::application::services::wopi_token_service::WopiTokenService;
 use crate::infrastructure::services::wopi_discovery_service::WopiDiscoveryService;
-use crate::application::ports::file_ports::{FileRetrievalUseCase, FileUploadUseCase};
 
 /// Shared state for WOPI handlers.
 #[derive(Clone)]