refactor: presentation becomes http-axum adapter, absorbs templates

crates/adapters/http-axum/src/openapi/insights.rs

@@ -0,0 +1,8 @@
+use utoipa::OpenApi;
+
+#[derive(OpenApi)]
+#[openapi(
+    paths(crate::handlers::insights::get_insights,),
+    components(schemas(api_types::insights::InsightsResponse, api_types::insights::InsightDto,))
+)]
+pub struct InsightsDoc;