fix(daemon): pass structured referencedBy in 409 conflict details

assistant/src/runtime/http-server.ts

@@ -630,6 +630,7 @@ export class RuntimeHttpServer {
             err.code as HttpErrorCode,
             err.message,
             err.statusCode,
+            err.details,
           );
         }
         throw err;

assistant/src/runtime/routes/errors.ts

@@ -77,8 +77,8 @@ export class UnprocessableEntityError extends RouteError {
 }
 
 export class ConflictError extends RouteError {
-  constructor(message: string) {
-    super(message, "CONFLICT", 409);
+  constructor(message: string, details?: unknown) {
+    super(message, "CONFLICT", 409, details);
     this.name = "ConflictError";
   }
 }

assistant/src/runtime/routes/inference-provider-connection-routes.ts

@@ -135,6 +135,7 @@ function handleDeleteConnection({ pathParams = {} }: RouteHandlerArgs) {
   if ((config.llm?.default as Record<string, unknown> | undefined)?.provider_connection === name) {
     throw new ConflictError(
       `Connection "${name}" is referenced by llm.default. Update llm.default.provider_connection before deleting.`,
+      { referencedBy: ["llm.default"] },
     );
   }
 
@@ -155,6 +156,7 @@ function handleDeleteConnection({ pathParams = {} }: RouteHandlerArgs) {
     if (result.error.code === "has_references") {
       throw new ConflictError(
         `Connection "${name}" is referenced by ${result.error.count} profile(s): ${referencingProfiles.join(", ")}.`,
+        { referencedBy: referencingProfiles },
       );
     }
     throw new BadRequestError("Delete failed.");