feat: Fix nutrition service and add location-based alerts

Changes:
- Fix nutrition service: add is_active column and Pydantic validation for UUID/datetime
- Add location-based alerts feature: users can now see alerts within 1km radius
- Fix CORS and response serialization in nutrition service
- Add getCurrentLocation() and loadAlertsNearby() functions
- Improve UI for nearby alerts display with distance and response count

services/location_service/main.py

@@ -418,6 +418,11 @@ async def delete_user_location(
 
     return {"message": "Location deleted successfully"}
 
+@app.get("/health")
+async def health_simple():
+    """Health check endpoint (simple)"""
+    return {"status": "healthy", "service": "location_service"}
+
 
 @app.get("/api/v1/health")
 async def health_check():