fix: add timeout and error wrapping to _find_sticky, clean up test fixture

app/services/platforms/reddit_comment.py

@@ -73,8 +73,12 @@ def _find_sticky(
     """
     # TODO: use session_file for authenticated requests on private subs
     url = f"https://www.reddit.com/r/{sub}/hot.json?limit=10"
-    response = httpx.get(url, headers={"User-Agent": "magpie/1.0"})
-    response.raise_for_status()
+    try:
+        response = httpx.get(url, headers={"User-Agent": "magpie/1.0"}, timeout=10)
+        response.raise_for_status()
+    except httpx.HTTPError as exc:
+        logger.warning("Reddit hot.json request failed for r/%s: %s", sub, exc)
+        raise RuntimeError(f"Failed to fetch hot listing for r/{sub}") from exc
     payload = response.json()
     if "data" not in payload:
         logger.warning("Unexpected Reddit API response: %r", payload)

tests/services/platforms/test_reddit_comment_strategy.py

@@ -9,7 +9,7 @@ def strategy():
     return RedditCommentStrategy()
 
 
-def test_execute_with_url_override(strategy, monkeypatch):
+def test_execute_with_url_override(strategy):
     """Uses thread_url_override to get thread_id, calls client.comment()"""
     mock_client = MagicMock()
     mock_client.comment.return_value = "https://www.reddit.com/r/flipping/comments/abc123/_/xyz789/"