Add lab restream pipeline with pirate_drift logo and lib/env.sh.

Encode-once/fanout scripts, HLS output, and single overloadable env source.
Commits assets/pirate_drift.png as default watermark for cluster runs.

Co-authored-by: Cursor <cursoragent@cursor.com>

config/local.env.example

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+# Copy to config/local.env — overrides lib/env.sh defaults (sourced last among repo config).
+
+# HLS on disk for nginx / web player:
+# HLS_OUTPUT_DIR="${ROOT}/storage/hls/live"
+
+# Lab RTMP sinks: edit config/sinks.list or per-pipeline work dir sinks.list

config/sinks.example.list

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+# RTMP (or other ffmpeg tee URL) destinations — fanout stage copies without re-encode.
+# Lines starting with # are ignored.
+#
+# rtmp://127.0.0.1/live/stream_key
+# rtmp://a.rtmp.youtube.com/live2/STREAM_KEY

config/sinks.list

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+# Migrated from streaming_v0 (sanitized — replace STREAM_KEY / host for your lab).
+# Active sinks for fanout-copy stage (stream copy, no re-encode).
+#
+# Local nginx-rtmp or MediaMTX lab ingest:
+# rtmp://127.0.0.1/live/dev
+#
+# YouTube Live (lab only — paste stream key from YouTube Studio):
+# rtmp://a.rtmp.youtube.com/live2/STREAM_KEY_HERE
+#
+# Twitch:
+# rtmp://live.twitch.tv/app/STREAM_KEY_HERE
+#
+# Previous v0 hopto relay (example — do not use without your own endpoint):
+# rtmp://your-relay.example.org/live/stream

config/sources.example.list

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+# One source per line: URL, file path, or page URL (yt-dlp when YTDLP_ENABLED=1).
+# Optional second column: yt-dlp format selector (e.g. bv*+ba/b).
+#
+# https://example.com/live/master.m3u8
+# /path/to/local/file.mkv
+# https://www.youtube.com/watch?v=EXAMPLE  bv*+ba/b

config/sources.list

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+# Migrated from streaming_v0 (sanitized — no expiring CDN tokens or credentials).
+# Format: URL [yt-dlp format selector]
+#
+# Page URLs (YouTube, etc.) — require YTDLP_ENABLED=1 in defaults.env or local.env
+https://www.youtube.com/watch?v=WQ4mwufOjEI
+https://www.youtube.com/watch?v=xaiQUHz8re4
+https://www.youtube.com/watch?v=Z-QVb-3D6zA
+https://www.youtube.com/watch?v=Trwer1xXYtY
+https://www.youtube.com/watch?v=n2CxmPwqq8w
+#
+# Direct HLS / file examples (uncomment for tests)
+# https://example.com/live/master.m3u8
+# /path/to/local/recording.mkv

config/yt-dlp.auth.example.env

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+# Copy to config/yt-dlp.auth.env — never commit real credentials.
+# Sourced only when yt-dlp needs authenticated pages (lab / non-prod).
+
+# YTDLP_USERNAME=
+# YTDLP_PASSWORD=
+# YTDLP_NETRC=1
+# YTDLP_EXTRA_ARGS=--referer https://example.com/