refactor(core): adopt CoreToolCallStatus enum for type safety (#18998)

packages/core/src/scheduler/tool-executor.ts

@@ -33,6 +33,7 @@ import type {
   SuccessfulToolCall,
   CancelledToolCall,
 } from './types.js';
+import { CoreToolCallStatus } from './types.js';
 
 export interface ToolExecutionContext {
   call: ToolCall;
@@ -81,7 +82,7 @@ export class ToolExecutor {
             const setPidCallback = (pid: number) => {
               const executingCall: ExecutingToolCall = {
                 ...call,
-                status: 'executing',
+                status: CoreToolCallStatus.Executing,
                 tool,
                 invocation,
                 pid,
@@ -170,7 +171,7 @@ export class ToolExecutor {
     }
 
     return {
-      status: 'cancelled',
+      status: CoreToolCallStatus.Cancelled,
       request: call.request,
       response: {
         callId: call.request.callId,
@@ -256,7 +257,7 @@ export class ToolExecutor {
     }
 
     return {
-      status: 'success',
+      status: CoreToolCallStatus.Success,
       request: call.request,
       tool: call.tool,
       response: successResponse,
@@ -281,7 +282,7 @@ export class ToolExecutor {
     const startTime = 'startTime' in call ? call.startTime : undefined;
 
     return {
-      status: 'error',
+      status: CoreToolCallStatus.Error,
       request: call.request,
       response,
       tool: call.tool,