style: apply cargo fmt to entire codebase

Standardize code formatting across all 173 Rust source files
using rustfmt. No functional changes - purely cosmetic.

This establishes a consistent code style baseline for the
project going forward.

src/infrastructure/mod.rs

@@ -3,4 +3,3 @@ pub mod auth_factory;
 pub mod db;
 pub mod repositories;
 pub mod services;
-