fix(fortuna): fix openapi schema (#2630)

apps/fortuna/Cargo.lock

@@ -1554,7 +1554,7 @@ dependencies = [
 
 [[package]]
 name = "fortuna"
-version = "7.5.0"
+version = "7.5.1"
 dependencies = [
  "anyhow",
  "axum",

apps/fortuna/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "fortuna"
-version = "7.5.0"
+version = "7.5.1"
 edition = "2021"
 
 [lib]

apps/fortuna/src/api/revelation.rs

@@ -125,7 +125,7 @@ pub struct RevelationPathParams {
 #[into_params(parameter_in=Query)]
 pub struct RevelationQueryParams {
     pub encoding: Option<BinaryEncoding>,
-    #[param(value_type = u64)]
+    #[param(value_type = Option<u64>)]
     pub block_number: Option<BlockNumber>,
 }