Add unattended recorder that finds the live stream itself

record_live.py runs the whole chain alone: headless browser only to learn the
entry id (it appears at runtime; static HTML has none when nothing is live),
then plain Python mints a fresh master playlist, then ffmpeg records.

No password needed. Firefox session cookies run to late November, well past
any kickoff, so the job authenticates from the stored session.

Three failures found by testing against a live feed rather than at kickoff:

- yt-dlp's native HLS downloader fetches variant playlists with Python and
  gets 403/404 on path-token URLs. Forced --downloader ffmpeg; this is
  required, not a preference.
- ffmpeg 4.3.1 has no -reconnect_on_network_error. Removed here and in
  catcher.py, which had the same unsupported flag.
- A master playlist outlives its stream: after a match ends the master is
  still served while its variants 404. So a found master does not mean a live
  stream, and a downloader that dies immediately means "not up yet" rather
  than "failed". It now retries until the wait window expires.

Untested: the actual segment download for an audio-only stream, because
nothing is live right now. Video was verified working on 29 Aug.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Kyt7QHQvLJtQRuiY4wAqKB

catcher.py

@@ -68,8 +68,9 @@ def start_recording(key, url, user_agent, page):
         # yt-dlp's own retry flags do NOT reach the ffmpeg downloader, which is
         # what actually pulls live HLS. These are ffmpeg's own reconnect knobs.
         "--downloader-args",
+        # ffmpeg 4.3.1 has no -reconnect_on_network_error.
         "ffmpeg_i:-reconnect 1 -reconnect_streamed 1 "
-        "-reconnect_on_network_error 1 -reconnect_delay_max 30",
+        "-reconnect_delay_max 30",
         "--downloader-args", f"ffmpeg_o:-t {DURATION_MIN * 60}",
         "-o", out,
         url,