feat: add Uptime Kuma integration with periodic ping task and configuration options

app/tasks/uptime_kuma_tasks.py

@@ -0,0 +1,30 @@
+#!/usr/bin/env python3
+
+import logging
+import requests
+from celery import shared_task
+
+from app.config import settings
+
+logger = logging.getLogger(__name__)
+
+@shared_task
+def ping_uptime_kuma():
+    """
+    Periodic Celery task that pings the configured Uptime Kuma URL
+    to report that the document processor service is running.
+    If no URL is configured, the task does nothing.
+    """
+    if not settings.uptime_kuma_url:
+        logger.debug("Uptime Kuma URL not configured, skipping ping")
+        return
+    
+    try:
+        logger.info(f"Pinging Uptime Kuma at {settings.uptime_kuma_url}")
+        response = requests.get(settings.uptime_kuma_url, timeout=10)
+        response.raise_for_status()
+        logger.info(f"Successfully pinged Uptime Kuma: {response.status_code}")
+        return True
+    except requests.exceptions.RequestException as e:
+        logger.error(f"Failed to ping Uptime Kuma: {e}")
+        return False