style: format seluruh workspace dengan cargo fmt

Menyeragamkan format kode sesuai rustfmt (126 file). Sebelumnya
lefthook pre-commit 'cargo fmt --check' akan gagal pada commit apa pun.

apps/infrastructure/src/mcp/manager.rs

@@ -31,7 +31,6 @@ impl Default for McpManager {
 }
 
 impl McpManager {
-
     /// Register an MCP server by name and transport string.
     ///
     /// Returns an error if a server with the same name is already registered.