- Add PlatformMetadata struct and generate_entry_title() covering all 13
Source variants (YouTubeVideo, YouTubePlaylist, YouTubeChannel, X, Tweet,
TweetThread, Instagram, Facebook, TikTok, Reddit, Snapchat, Local, Other)
- Add downloader/metadata.rs: extract_from_ytdlp_json() parses yt-dlp
--dump-json output into PlatformMetadata; extracts Reddit subreddit
from webpage_url via regex
- Add ytdlp::fetch_metadata(): separate --dump-json invocation that does
not interfere with the actual download call
- Extend record_media_entry() with title: Option<String> param; wire
yt-dlp metadata fetch + local filename extraction in perform_capture
- Restructure record_tweet_entry() to read tweet JSON before entry
creation; extract title via tweet_metadata_from_json()
- 16 title-generation unit tests + 6 metadata extraction unit tests