feat: enhance /api/health with version, uptime, workerPath, and AI status

Replace hardcoded TEST-008 build ID with real package version. Add worker
filesystem path, uptime counter, and AI provider status (including last
interaction success/failure tracking) to the health endpoint response.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/services/server/Server.ts

@@ -30,6 +30,19 @@ export interface RouteHandler {
   setupRoutes(app: Application): void;
 }
 
+/**
+ * AI provider status for health endpoint
+ */
+export interface AiStatus {
+  provider: string;
+  authMethod: string;
+  lastInteraction: {
+    timestamp: number;
+    success: boolean;
+    error?: string;
+  } | null;
+}
+
 /**
  * Options for initializing the server
  */
@@ -42,6 +55,10 @@ export interface ServerOptions {
   onShutdown: () => Promise<void>;
   /** Restart function for admin endpoints */
   onRestart: () => Promise<void>;
+  /** Filesystem path to the worker entry point */
+  workerPath: string;
+  /** Callback to get current AI provider status */
+  getAiStatus: () => AiStatus;
 }
 
 /**
@@ -140,20 +157,20 @@ export class Server {
    * Setup core system routes (health, readiness, version, admin)
    */
   private setupCoreRoutes(): void {
-    // Test build ID for debugging which build is running
-    const TEST_BUILD_ID = 'TEST-008-wrapper-ipc';
-
     // Health check endpoint - always responds, even during initialization
     this.app.get('/api/health', (_req: Request, res: Response) => {
       res.status(200).json({
         status: 'ok',
-        build: TEST_BUILD_ID,
+        version: BUILT_IN_VERSION,
+        workerPath: this.options.workerPath,
+        uptime: Date.now() - this.startTime,
         managed: process.env.CLAUDE_MEM_MANAGED === 'true',
         hasIpc: typeof process.send === 'function',
         platform: process.platform,
         pid: process.pid,
         initialized: this.options.getInitializationComplete(),
         mcpReady: this.options.getMcpReady(),
+        ai: this.options.getAiStatus(),
       });
     });