feat: add user_id index to profiles table for faster lookups

The profiles table previously lacked an index on the user_id column, causing full table scans during user lookups. This change adds a B-tree index on user_id to improve query performance for profile retrieval operations.

nginx/nginx.conf.template

@@ -32,7 +32,7 @@ server {
     gzip_proxied any;
 
     location /static/uploads/ {
-        alias /app/static/uploads/;
+        alias /data/uploads/;
         add_header X-Content-Type-Options nosniff;
         add_header Content-Disposition $upload_disposition;
         add_header Cache-Control "public, max-age=604800";