Add indexes and pagination to improve app performance

app/routes/user.py

@@ -67,7 +67,9 @@ def profile_image(user_id):
         response.headers.set('Content-Type', 'image/jpeg')
         response.headers.set('Cache-Control', 'public, max-age=86400')  # Cache for 1 day
         response.headers.set('ETag', str(hash(profile.profile_pic)))  # Unique ETag for the image
-        response.headers.set('Last-Modified', http_date(datetime.utcnow().timestamp()))
+        # Use actual profile update time instead of utcnow() which defeats caching
+        last_modified = profile.updated_at or datetime.utcnow()
+        response.headers.set('Last-Modified', http_date(last_modified.timestamp()))
 
         return response
     else: