feat: harden demo flows and observability

apps/admin-api/src/error.rs

@@ -9,6 +9,7 @@ use mcpaas_runtime::RuntimeError;
 use mcpaas_schema::SchemaError;
 use serde_json::{Value, json};
 use thiserror::Error;
+use tracing::{error, warn};
 
 use crate::storage::StorageError;
 
@@ -70,6 +71,17 @@ impl ApiError {
 
 impl IntoResponse for ApiError {
     fn into_response(self) -> Response {
+        match &self {
+            Self::Internal { message } => {
+                error!(error_code = self.code(), error_message = %message)
+            }
+            Self::Validation { message }
+            | Self::NotFound { message }
+            | Self::Conflict { message } => {
+                warn!(error_code = self.code(), error_message = %message)
+            }
+        }
+
         let body = Json(json!({
             "error": {
                 "code": self.code(),
@@ -137,7 +149,19 @@ impl From<StorageError> for ApiError {
 
 pub fn runtime_test_failure(error: &RuntimeError) -> Value {
     json!({
-        "code": "runtime_test_error",
+        "code": runtime_test_failure_code(error),
         "message": error.to_string()
     })
 }
+
+fn runtime_test_failure_code(error: &RuntimeError) -> &'static str {
+    match error {
+        RuntimeError::Schema(_) => "runtime_schema_error",
+        RuntimeError::Mapping(_) => "runtime_mapping_error",
+        RuntimeError::GraphqlAdapter(_) => "runtime_graphql_error",
+        RuntimeError::GrpcAdapter(_) => "runtime_grpc_error",
+        RuntimeError::RestAdapter(_) => "runtime_rest_error",
+        RuntimeError::UnsupportedProtocol { .. } => "runtime_protocol_error",
+        RuntimeError::InvalidPreparedRequest { .. } => "runtime_request_error",
+    }
+}