Type design: VideoInfo raw/validated split, callback-data codec, context narrowing

[miridius]

From the /review-pr baseline (type-design-analyzer):

• VideoInfo understates the real payload (formats/resolution/format_id/extractor/playlist_title/id consumed via any in logFormats/parseRes/parseCaption) and overstates optionality (webpage_url). Split RawVideoInfo (mirrors yt-dlp) from validated VideoInfo (webpage_url required) built by one parse function; deletes the ! and the anys.
• Callback data protocol is stringly typed and split across produce (dl:${id}) and parse (regex) sites — add encodeCallback/decodeCallback pair.
• types.ts CallbackQueryContext should narrow to Update.CallbackQueryUpdate<CallbackQuery.DataQuery> (and/or use callbackQuery('data') filter), deleting (ctx.callbackQuery as any).data.
• LogMessage/NoLog: extract a Log interface; NoLog as standalone null object instead of subclass-with-no-op-overrides.
• memoize key type says string | false but runtime treats '' as skip-cache — align.