Fetches a single Truth Social post by URL, returning text, id, created_at, url, content, account details, media_attachments, card link previews, replies_count, reblogs_count, and favourites_count. Set download_media=true to download attached images or video and return permanent Supabase URLs. Only posts from prominent public figures (e.g., Trump, Vance) are accessible without authentication. Uses the caller's OpenAny gateway credentials. Charges and authorization are determined by the gateway.