Enhance Users Service and DTOs

- Added Default trait to UsersDetailItemDto for easier instantiation.
- Refactored UsersServiceTrait to use Pin<Box<dyn Future<...>> for async functions, improving compatibility with async/await.
- Updated all service methods to return futures instead of using async_trait.
- Improved error handling and logging in upload_file method, ensuring proper handling of multipart data.
- Masked sensitive information in Env struct's Debug implementation for better security in logs.
- Cleaned up Cargo.toml by removing unnecessary async-trait workspace dependency.

Cargo.lock

@@ -2249,7 +2249,6 @@ name = "imphnen-iam"
 version = "0.1.0"
 dependencies = [
  "anyhow",
- "async-trait",
  "axum",
  "axum-extra",
  "axum-test",
@@ -4974,7 +4973,6 @@ checksum = "8f50febec83f5ee1df3015341d8bd429f2d1cc62bcba7ea2076759d315084683"
 name = "tests"
 version = "0.1.0"
 dependencies = [
- "async-trait",
  "axum",
  "chrono",
  "dotenvy",