Assign META0013 to DiscoveryError::BadResponse

Most likely, a DiscoveryError::BadResponse is caused by an
incompatible service endpoint.

crates/errors/src/error_codes/META0013.md

@@ -0,0 +1,9 @@
+## META0013
+
+Received a bad service discovery response from the specified service endpoint. This indicates that you are trying to register a service endpoint with an incompatible server. 
+
+Suggestions:
+
+* Check the compatibility matrix between SDK and server versions
+  * Either deploy a server version which is compatible with your SDK
+  * Or use an SDK version which is compatible with your server

crates/errors/src/lib.rs

@@ -36,7 +36,7 @@ mod helper;
 
 declare_restate_error_codes!(
     RT0001, RT0002, RT0003, RT0004, RT0005, RT0006, RT0007, RT0009, RT0010, RT0011, RT0012,
-    META0003, META0004, META0005, META0006, META0009, META0010, META0011, META0012
+    META0003, META0004, META0005, META0006, META0009, META0010, META0011, META0012, META0013
 );
 
 // -- Some commonly used errors

crates/service-protocol/src/discovery.rs

@@ -17,7 +17,7 @@ use hyper::http::response::Parts as ResponseParts;
 use hyper::http::uri::PathAndQuery;
 use hyper::http::{HeaderName, HeaderValue};
 use hyper::{Body, HeaderMap, StatusCode};
-use restate_errors::{META0003, META0012};
+use restate_errors::{META0003, META0012, META0013};
 use restate_schema_api::deployment::ProtocolType;
 use restate_schema_api::MAX_SERVICE_PROTOCOL_VERSION_VALUE;
 use restate_service_client::{Endpoint, Parts, Request, ServiceClient, ServiceClientError};
@@ -86,7 +86,7 @@ pub struct DiscoveredMetadata {
 pub enum DiscoveryError {
     // Errors most likely related to SDK bugs
     #[error("received a bad response from the SDK: {0}")]
-    #[code(unknown)]
+    #[code(META0013)]
     BadResponse(Cow<'static, str>),
     #[error(
         "received a bad response from the SDK that cannot be decoded: {0}. Discovery response: {}",