chore(devops): move prod deploy config out of the app repo

The real docker-compose.home.yml + CLAUDE.md lived only in the working tree via a
fragile .git/info/exclude hack (leak-prone). They now live in a separate PRIVATE
devops repo (siftlode-ops). This repo keeps only a generic, placeholder-templated
docker-compose.home.yml.example plus the existing .env.example (extended with the
optional Plex keys), so nothing environment-specific can leak here. Exclude emptied.

.env.example

@@ -62,3 +62,15 @@ SCHEDULER_ENABLED=true
 # directory instead — e.g. one your Plex server can read — to keep the Plex-style tree there.
 # The path must be writable by the container user (uid of `appuser`, 1000): chown 1000:1000 <dir>.
 # DOWNLOAD_HOST_PATH=/mnt/media/youtube
+
+# --- Plex integration (optional) ---
+# The optional Plex module browses/plays your Plex library, playing the LOCAL physical file
+# directly (Plex is used for metadata only). Enable it in the admin Config page (server URL,
+# token, path map, libraries). For playback the container must be able to READ the media files,
+# so bind-mount your Plex media into the container read-only via PLEX_MEDIA_HOST_PATH — it maps
+# to /plex-media inside the container (the local side of the admin "path map", whose default is
+# /data=/plex-media). Leave unset if you don't use Plex.
+# PLEX_MEDIA_HOST_PATH=/mnt/media
+# Optional: scratch dir for on-the-fly HLS remux segments. Defaults to DOWNLOAD_ROOT; point it at
+# fast local storage if your download volume is slow.
+# PLEX_HLS_DIR=/var/tmp/plex-hls