Add /api/health endpoint for service monitoring and health checks

app.py

@@ -401,6 +401,8 @@ with gr.Blocks(title="Industrial Defect Detection") as demo:
     with gr.Row(visible=False):
         models_btn = gr.Button("Get Models")
         models_output = gr.JSON()
+        health_btn = gr.Button("Health Check")
+        health_output = gr.JSON()
 
     def get_models():
         """Return list of available models."""
@@ -409,6 +411,16 @@ with gr.Blocks(title="Industrial Defect Detection") as demo:
             "count": len(MODELS)
         }
 
+    def health_check():
+        """Health check endpoint for monitoring."""
+        return {
+            "status": "healthy",
+            "service": "Gradio Inference (HuggingFace)",
+            "models_loaded": len(sessions),
+            "available_models": len(MODELS),
+            "timestamp": datetime.now().isoformat()
+        }
+
     models_btn.click(
         fn=get_models,
         inputs=[],
@@ -416,6 +428,13 @@ with gr.Blocks(title="Industrial Defect Detection") as demo:
         api_name="models"  # Creates /api/models endpoint
     )
 
+    health_btn.click(
+        fn=health_check,
+        inputs=[],
+        outputs=health_output,
+        api_name="health"  # Creates /api/health endpoint
+    )
+
 # Launch the app
 if __name__ == "__main__":
     demo.launch()