feat: add user_id index to profiles table for faster lookups

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

.gitea/workflows/test.yaml

@@ -37,14 +37,14 @@ jobs:
 
       - name: Publish coverage HTML
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v3
         with:
           name: coverage-html
           path: htmlcov/
 
       - name: Upload test screenshots
         if: failure()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v3
         with:
           name: failure-screenshots
           path: /tmp/devplace_test_screenshots/