fix: cargo fmt, add .gitleaks.toml allowlist for doc examples

- remove extra blank lines in openapi.rs and secrets/mod.rs
- allowlist commit 92155cf (curl -u admin:yourpassword in README)

nora-registry/src/openapi.rs

@@ -5,7 +5,6 @@
 //!
 //! Functions in this module are stubs used only for generating OpenAPI documentation.
 
-
 #![allow(dead_code)] // utoipa doc stubs — not called at runtime, used by derive macros
 
 use axum::Router;