fix(comments): resolve ruff lint errors

Remove unused imports (urlencode, F) and fix import sort order in
test_v2.py.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

apps/comments/tests/test_v2.py

@@ -14,7 +14,6 @@ from apps.blog.models import ArticleIndexPage, ArticlePage
 from apps.blog.tests.factories import AuthorFactory
 from apps.comments.models import Comment, CommentReaction
 
-
 # ── Fixtures ──────────────────────────────────────────────────────────────────