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.

tests/e2e/admin/bots/index.py

@@ -0,0 +1,23 @@
+# retoor <retoor@molodetz.nl>
+
+from tests.conftest import BASE_URL
+
+
+def test_admin_bots_page_loads(alice):
+    page, _ = alice
+    page.goto(f"{BASE_URL}/admin/bots", wait_until="domcontentloaded")
+    assert page.is_visible("text=Bot Monitor")
+    assert page.locator("#bots-grid").count() == 1
+
+
+def test_admin_bots_sidebar_link(alice):
+    page, _ = alice
+    page.goto(f"{BASE_URL}/admin/services", wait_until="domcontentloaded")
+    link = page.locator("a.sidebar-link[href='/admin/bots']")
+    link.wait_for(state="visible")
+    assert link.count() == 1
+
+
+def test_admin_bots_redirect_unauth(page, app_server):
+    page.goto(f"{BASE_URL}/admin/bots", wait_until="domcontentloaded")
+    assert page.url.startswith(f"{BASE_URL}/auth/login")