feat: filter site bodies before media upload

STATE.md

@@ -27,7 +27,7 @@ Current runtime is local infrastructure, not the old VPS.
 - Templates: `src/vk_parser_app/templates`
 - Workers:
   - VK parser: `src/vk_parser_app/workers/parser.py`
-  - Telegram media/storage uploader: `src/vk_parser_app/workers/vk_storage_uploader.py`
+  - Telegram media/storage uploader: `src/vk_parser_app/workers/media_uploader.py`
   - AI qualifier: `src/vk_parser_app/workers/ai_qualifier.py`
   - AI writer: `src/vk_parser_app/workers/ai_writer.py`
 - DB migrations: `db/migrations`
@@ -66,7 +66,7 @@ canonical git repository as FN-8. Code work for both projects must happen in
 - VK publication owner: `vk_poster_owner_id=-36860851`, `vk_poster_from_group=true`.
 - `TG_BOT_TOKEN`, `TELEGRAM_API_ID`, and `TELEGRAM_API_HASH` were copied from FN-8 Coolify env.
 - Local Bot API app setting: `local_bot_api_url=http://127.0.0.1:8081`.
-- As last checked, RAA has `vk-parser=true`, `vk-storage-uploader=true`.
+- As last checked, RAA has `vk-parser=true`, `media-uploader=true`.
   AI and publication workers are intentionally disabled until explicitly started:
   `ai-qualifier=false`, `ai-writer=false`, `tg-poster=false`, `vk-poster=false`,
   `site-poster=false`, `tg_poster_enabled=false`, `vk_poster_enabled=false`.