Do not auto-download enclosures that are not audio or video

Blog feeds put each article's header image in an <enclosure>, so a text
feed read as a podcast full of episodes: 149 images, 74 MB across 11
feeds. media_types defaults to audio and video, with a per-feed override.

Such enclosures stay listed and stay downloadable by hand; the row names
what it is rather than saying "skipped". An unknown type is allowed, since
the real type is only known after downloading, and a torrent is allowed as
a container judged once unpacked.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AdXho5tTkjFLeUXKbEjKBh

README.md

@@ -59,6 +59,9 @@ organize       = "feed"      # "feed" | "date"
 max_total_gb   = 50          # 0 = unlimited
 max_age_days   = 30          # 0 = keep forever
 max_new_per_check = 3        # per feed, per scan. 0 = unlimited (pulls whole back catalogues)
+media_types = ["audio", "video"]  # what downloads automatically. Anything else is still
+                             # listed and can be fetched by hand -- blog feeds put article
+                             # images in enclosures. Empty takes everything.
 
 [torrent]
 enabled        = true