style: Apply rustfmt with stable-only config

- Fixed rustfmt.toml to only use stable options (removed nightly-only)
- Applied cargo fmt --all to fix formatting violations
- Stable options: edition=2021, max_width=100, reorder_imports/modules, match_block_trailing_comma

crates/pm-web/src/routes/status.rs

@@ -2,13 +2,7 @@
 //!
 //! GET /api/v1/status/fleet — aggregate health and patch summary across all hosts.
 
-use axum::{
-    extract::State,
-    http::StatusCode,
-    response::Json,
-    routing::get,
-    Router,
-};
+use axum::{extract::State, http::StatusCode, response::Json, routing::get, Router};
 use serde::Serialize;
 use serde_json::{json, Value};