Complete multi-source Beast format implementation

Major features implemented:
- Beast binary format parser with full Mode S/ADS-B decoding
- Multi-source data merger with intelligent signal-based fusion
- Advanced web frontend with 5 view modes (Map, Table, Stats, Coverage, 3D)
- Real-time WebSocket updates with sub-second latency
- Signal strength analysis and coverage heatmaps
- Debian packaging with systemd integration
- Production-ready deployment with security hardening

Technical highlights:
- Concurrent TCP clients with auto-reconnection
- CPR position decoding and aircraft identification
- Historical flight tracking with position trails
- Range circles and receiver location visualization
- Mobile-responsive design with professional UI
- REST API and WebSocket real-time updates
- Comprehensive build system and documentation

🤖 Generated with [Claude Code](https://claude.ai/code)

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

debian/lib/systemd/system/skyview.service

@@ -0,0 +1,47 @@
+[Unit]
+Description=SkyView Multi-Source ADS-B Aircraft Tracker
+Documentation=https://github.com/skyview/skyview
+After=network.target
+Wants=network.target
+
+[Service]
+Type=simple
+User=skyview
+Group=skyview
+ExecStart=/usr/bin/skyview -config /etc/skyview/config.json
+WorkingDirectory=/var/lib/skyview
+StandardOutput=journal
+StandardError=journal
+SyslogIdentifier=skyview
+Restart=always
+RestartSec=5
+
+# Security settings
+NoNewPrivileges=true
+ProtectSystem=strict
+ProtectHome=true
+PrivateTmp=true
+PrivateDevices=true
+ProtectHostname=true
+ProtectClock=true
+ProtectKernelTunables=true
+ProtectKernelModules=true
+ProtectKernelLogs=true
+ProtectControlGroups=true
+RestrictRealtime=true
+RestrictSUIDSGID=true
+RemoveIPC=true
+RestrictNamespaces=true
+
+# Allow network access
+PrivateNetwork=false
+
+# Allow writing to log directory
+ReadWritePaths=/var/log/skyview
+
+# Capabilities
+CapabilityBoundingSet=CAP_NET_BIND_SERVICE
+AmbientCapabilities=CAP_NET_BIND_SERVICE
+
+[Install]
+WantedBy=multi-user.target