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/search_handler.rs

@@ -7,10 +7,10 @@ use serde_json::json;
 use tracing::{error, info};
 
 use crate::application::dtos::search_dto::SearchCriteriaDto;
+use crate::application::ports::inbound::SearchUseCase;
 use crate::common::di::AppState;
 use crate::interfaces::middleware::auth::AuthUser;
 use std::sync::Arc;
-use crate::application::ports::inbound::SearchUseCase;
 
 /**
  * Handler for search operations through the API.