test(telemetry): complete native MCP mock so validateToolExists runs the real path

Author: edelauna

src/core/assistant-message/__tests__/presentAssistantMessage-tool-usage-attribution.spec.ts

@@ -245,6 +245,12 @@ describe("presentAssistantMessage - tool usage attribution", () => {
 					}),
 					getMcpHub: () => ({
 						findServerNameBySanitizedName: () => "my_server",
+						getAllServers: () => [
+							{
+								name: "my_server",
+								tools: [{ name: "do_thing", enabledForPrompt: true }],
+							},
+						],
 					}),
 				}),
 			}