feat: add discovery

Signed-off-by: kjuulh <contact@kjuulh.io>

crates/churn/src/grpc/churn.v1.rs

@@ -32,5 +32,19 @@ pub struct SetKeyRequest {
 #[derive(Clone, Copy, PartialEq, ::prost::Message)]
 pub struct SetKeyResponse {
 }
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct ListenEventsRequest {
+    #[prost(string, tag="1")]
+    pub namespace: ::prost::alloc::string::String,
+    #[prost(string, optional, tag="2")]
+    pub id: ::core::option::Option<::prost::alloc::string::String>,
+}
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct ListenEventsResponse {
+    #[prost(string, tag="1")]
+    pub value: ::prost::alloc::string::String,
+}
 include!("churn.v1.tonic.rs");
 // @@protoc_insertion_point(module)