mount: prefer boot disk ESP and run cargo fmt

* choose ESP matching the primary data disk when multiple ESPs exist,
  falling back gracefully for single-disk layouts
* keep new helper to normalize device names and reuse the idempotent
  mount logic
* apply cargo fmt across the tree

src/lib.rs

@@ -1,20 +1,20 @@
 //! Crate root for zosstorage: one-shot disk provisioning utility for initramfs.
 
 pub mod cli;
-pub mod logging;
 pub mod config;
 pub mod device;
-pub mod partition;
-pub mod fs;
-pub mod mount;
-pub mod report;
-pub mod orchestrator;
-pub mod idempotency;
-pub mod util;
 pub mod errors;
-pub mod types; // top-level types (moved from config/types.rs for visibility)
+pub mod fs;
+pub mod idempotency;
+pub mod logging;
+pub mod mount;
+pub mod orchestrator;
+pub mod partition;
+pub mod report;
+pub mod types;
+pub mod util; // top-level types (moved from config/types.rs for visibility)
 
 pub use errors::{Error, Result};
 
 /// Crate version string from Cargo.
-pub const VERSION: &str = env!("CARGO_PKG_VERSION");
+pub const VERSION: &str = env!("CARGO_PKG_VERSION");