Silence Telegram alerts for listings whose title contains a keyword
configured for that watch, matched case-insensitively as a substring.
- New IgnoredKeywords table: search_url (watch key) + keyword (one per row)
- load_ignored_keywords() returns {search_url: {lowercase keywords}}, reloaded
every notification cycle so UI edits apply immediately
- title_matches_keyword() does the case-insensitive substring check
- send_pending_notifications() now also pulls search_url on pending records;
skip_notify=true + notified=true on a hit (still archived, no Telegram)
- Docs updated: AGENTS.md, README.md, DOCUMENTATION.md
New Listings.skip_notify checkbox and IgnoredSellers table (seller_name).\nPending listings whose seller_name matches the ignore list are marked\nskip_notify=true + notified=true and never sent to Telegram. List reloads\nevery notification cycle so UI add/remove takes effect immediately.