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>

config.example.json

@@ -0,0 +1,43 @@
+{
+  "server": {
+    "host": "",
+    "port": 8080
+  },
+  "sources": [
+    {
+      "id": "primary",
+      "name": "Primary Site",
+      "host": "localhost",
+      "port": 30005,
+      "latitude": 51.4700,
+      "longitude": -0.4600,
+      "altitude": 50.0,
+      "enabled": true
+    },
+    {
+      "id": "secondary",
+      "name": "Secondary Site",
+      "host": "192.168.1.100",
+      "port": 30005,
+      "latitude": 51.4800,
+      "longitude": -0.4500,
+      "altitude": 45.0,
+      "enabled": true
+    },
+    {
+      "id": "remote",
+      "name": "Remote Site",
+      "host": "remote.example.com",
+      "port": 30005,
+      "latitude": 51.4900,
+      "longitude": -0.4400,
+      "altitude": 60.0,
+      "enabled": false
+    }
+  ],
+  "settings": {
+    "history_limit": 1000,
+    "stale_timeout": 60,
+    "update_rate": 1
+  }
+}