docs(http): mark http/adapters/to-openapi completed + fix formatting

to_openapi gateway projection merged: 5-endpoint OpenAPI doc (ADR-042/045), pure
projection, info.version 1.0.0, error fidelity (ADR-023). 230 tests pass. Clippy clean.

crates/alknet-http/src/server/adapter.rs

@@ -695,7 +695,6 @@ mod tests {
         assert!(response.contains("location: https://example.com"));
     }
 
-
     #[tokio::test]
     async fn openapi_json_route_serves_gateway_spec() {
         let adapter = HttpAdapter::new(provider(), empty_registry());