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/application/services/search_service.rs

@@ -15,10 +15,10 @@ use crate::application::ports::inbound::SearchUseCase;
 use crate::application::ports::storage_ports::FileReadPort;
 use crate::common::errors::Result;
 use crate::domain::entities::folder::Folder;
-use std::hash::{Hash, Hasher};
+use crate::domain::repositories::folder_repository::FolderRepository;
 use crate::infrastructure::repositories::pg::file_blob_read_repository::FileBlobReadRepository;
 use crate::infrastructure::repositories::pg::folder_db_repository::FolderDbRepository;
-use crate::domain::repositories::folder_repository::FolderRepository;
+use std::hash::{Hash, Hasher};
 
 /**
  * High-performance search service implementation for files and folders.