The ScrapeCreators 402 (payment required / credits exhausted) status
was being swallowed by the broad except Exception handlers in
_global_search, _subreddit_search, and fetch_post_comments, returning
[] instead of propagating. That caused users with exhausted credits
to silently get zero Reddit results instead of falling through to
the OpenAI / public Reddit JSON fallback chain in _search_reddit_thread.
Add 402 to the existing 401/403 re-raise list across all three
ScrapeCreators call paths. Closes#170.
Co-authored-by: Jonathan Oppenheim <no-reply@postquantum.space>
Trevin Chow