Add SQL query patterns documentation and Linux package build scripts

- Created `TV_SHOWS_SQL_QUERY_PATTERNS.md` to document SQL query patterns for TV shows, including performance issues and missing indexes.
- Added `README.md` for Linux package building, detailing steps for creating Debian and Red Hat packages.
- Implemented build scripts for Debian and Red Hat, including service files and post-installation hooks.
- Added necessary scripts for managing Jellyfin service lifecycle on both Debian and Red Hat systems.
- Included package specifications and installation instructions for both distributions.

scripts/debian/postinst

@@ -0,0 +1,83 @@
+#!/bin/bash
+# Jellyfin postinst script - runs after package installation
+
+set -e
+
+# Create jellyfin user if it doesn't exist
+if ! getent passwd jellyfin > /dev/null; then
+    useradd --system \
+        --home /var/lib/jellyfin \
+        --shell /bin/false \
+        --comment "Jellyfin Media Server" \
+        jellyfin
+fi
+
+# Create necessary directories
+mkdir -p /var/lib/jellyfin
+mkdir -p /var/log/jellyfin
+mkdir -p /var/cache/jellyfin
+mkdir -p /etc/jellyfin
+
+# Set proper ownership and permissions
+chown -R jellyfin:jellyfin /var/lib/jellyfin
+chown -R jellyfin:jellyfin /var/log/jellyfin
+chown -R jellyfin:jellyfin /var/cache/jellyfin
+chown -R jellyfin:jellyfin /etc/jellyfin
+chmod 755 /var/lib/jellyfin
+chmod 755 /var/log/jellyfin
+chmod 755 /var/cache/jellyfin
+chmod 755 /etc/jellyfin
+
+# Set permissions on the application directory
+chown -R jellyfin:jellyfin /opt/jellyfin
+chmod -R 755 /opt/jellyfin
+
+# Create systemd service file if it doesn't exist
+if [[ ! -f /etc/systemd/system/jellyfin.service ]]; then
+    cat > /etc/systemd/system/jellyfin.service << 'EOF'
+[Unit]
+Description=Jellyfin Media Server
+After=network.target
+
+[Service]
+Type=simple
+User=jellyfin
+Group=jellyfin
+WorkingDirectory=/var/lib/jellyfin
+ExecStart=/opt/jellyfin/jellyfin --webdir=/opt/jellyfin/wwwroot --logdir=/var/log/jellyfin --datadir=/var/lib/jellyfin --cachedir=/var/cache/jellyfin
+Restart=on-failure
+RestartSec=10
+StandardOutput=journal
+StandardError=journal
+Environment="PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
+
+[Install]
+WantedBy=multi-user.target
+EOF
+fi
+
+# Reload systemd daemon
+systemctl daemon-reload
+
+# Enable and start the service
+if [[ -f /etc/systemd/system/jellyfin.service ]]; then
+    systemctl enable jellyfin.service
+    systemctl restart jellyfin.service || true
+fi
+
+# Display post-installation message
+echo ""
+echo "=========================================="
+echo "Jellyfin Media Server installed!"
+echo "=========================================="
+echo ""
+echo "Service status: systemctl status jellyfin"
+echo "View logs:      journalctl -u jellyfin -f"
+echo "Configuration: /etc/jellyfin/"
+echo "Data:          /var/lib/jellyfin/"
+echo "Logs:          /var/log/jellyfin/"
+echo ""
+echo "Access Jellyfin at: http://localhost:8096"
+echo ""
+
+exit 0