Add clip generator, hourly stats cron, and transcription improvements

- make_clips.py: Extract best moments from episodes as short-form clips
  (9:16 vertical MP4 with captions for TikTok/Shorts/Reels)
- deploy_stats_cron.sh: Deploy podcast_stats.py to NAS as Docker container
  running hourly with auto-restart
- podcast_stats.py: Add _find_ytdlp() for Docker compatibility, auto-detect
  local Docker for Castopod DB queries
- publish_episode.py: Upgrade Whisper model from base to large-v3

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

deploy_stats_cron.sh

@@ -0,0 +1,73 @@
+#!/bin/bash
+# Deploy podcast_stats.py to NAS as a long-running Docker container that updates hourly.
+#
+# Usage: ./deploy_stats_cron.sh
+
+set -e
+
+NAS_HOST="mmgnas-10g"
+NAS_USER="luke"
+NAS_PORT="8001"
+DOCKER_BIN="/share/CACHEDEV1_DATA/.qpkg/container-station/bin/docker"
+DEPLOY_DIR="/share/CACHEDEV1_DATA/podcast-stats"
+CONTAINER_NAME="podcast-stats"
+
+echo "Deploying podcast stats to NAS..."
+
+# Create deploy dir and copy files
+ssh -p "$NAS_PORT" "$NAS_USER@$NAS_HOST" "mkdir -p $DEPLOY_DIR"
+scp -P "$NAS_PORT" podcast_stats.py "$NAS_USER@$NAS_HOST:$DEPLOY_DIR/podcast_stats.py"
+
+# Create Dockerfile locally, then copy it over (NAS /tmp is tiny)
+TMPFILE=$(mktemp)
+cat > "$TMPFILE" << 'DOCKERFILE'
+FROM python:3.11-slim
+RUN apt-get update && apt-get install -y --no-install-recommends curl && rm -rf /var/lib/apt/lists/* \
+    && curl -fsSL https://download.docker.com/linux/static/stable/x86_64/docker-27.5.1.tgz | tar xz --strip-components=1 -C /usr/local/bin docker/docker \
+    && apt-get purge -y curl && apt-get autoremove -y
+RUN pip install --no-cache-dir requests yt-dlp
+COPY podcast_stats.py /app/podcast_stats.py
+COPY run_loop.sh /app/run_loop.sh
+RUN chmod +x /app/run_loop.sh
+WORKDIR /app
+CMD ["/app/run_loop.sh"]
+DOCKERFILE
+scp -P "$NAS_PORT" "$TMPFILE" "$NAS_USER@$NAS_HOST:$DEPLOY_DIR/Dockerfile"
+rm "$TMPFILE"
+
+# Create the loop script
+TMPFILE=$(mktemp)
+cat > "$TMPFILE" << 'LOOPSCRIPT'
+#!/bin/sh
+echo "podcast-stats: starting hourly loop"
+while true; do
+    echo "$(date -u '+%Y-%m-%dT%H:%M:%SZ') Running stats update..."
+    python podcast_stats.py --json --upload 2>&1 || echo "  ...failed, will retry next hour"
+    echo "Sleeping 1 hour..."
+    sleep 3600
+done
+LOOPSCRIPT
+scp -P "$NAS_PORT" "$TMPFILE" "$NAS_USER@$NAS_HOST:$DEPLOY_DIR/run_loop.sh"
+rm "$TMPFILE"
+
+echo "Building Docker image on NAS..."
+ssh -p "$NAS_PORT" "$NAS_USER@$NAS_HOST" \
+    "TMPDIR=$DEPLOY_DIR $DOCKER_BIN build -t $CONTAINER_NAME $DEPLOY_DIR"
+
+# Stop old container if running
+ssh -p "$NAS_PORT" "$NAS_USER@$NAS_HOST" \
+    "$DOCKER_BIN rm -f $CONTAINER_NAME 2>/dev/null || true"
+
+# Run as a daemon with auto-restart (survives reboots)
+echo "Starting container..."
+ssh -p "$NAS_PORT" "$NAS_USER@$NAS_HOST" \
+    "$DOCKER_BIN run -d --name $CONTAINER_NAME --restart unless-stopped --network host -v /var/run/docker.sock:/var/run/docker.sock $CONTAINER_NAME"
+
+echo "Verifying..."
+sleep 3
+ssh -p "$NAS_PORT" "$NAS_USER@$NAS_HOST" \
+    "$DOCKER_BIN logs $CONTAINER_NAME 2>&1 | tail -5"
+
+echo ""
+echo "Done! Container runs hourly in a loop with --restart unless-stopped."
+echo "  Logs: ssh -p $NAS_PORT $NAS_USER@$NAS_HOST '$DOCKER_BIN logs -f $CONTAINER_NAME'"