v0.9.5: The Voltron Update — modular architecture, stable IDs, parallelized boot

- Parallelized startup (60s → 15s) via ThreadPoolExecutor
- Adaptive polling engine with ETag caching (no more bbox interrupts)
- useCallback optimization for interpolation functions
- Sliding LAYERS/INTEL edge panels replace bulky Record Panel
- Modular fetcher architecture (flights, geo, infrastructure, financial, earth_observation)
- Stable entity IDs for GDELT & News popups (PR #63, credit @csysp)
- Admin auth (X-Admin-Key), rate limiting (slowapi), auto-updater
- Docker Swarm secrets support, env_check.py validation
- 85+ vitest tests, CI pipeline, geoJSON builder extraction
- Server-side viewport bbox filtering reduces payloads 80%+

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

Former-commit-id: f2883150b5bc78ebc139d89cc966a76f7d7c0408

README.md

@@ -442,6 +442,27 @@ This starts:
 * **Next.js** frontend on `http://localhost:3000`
 * **FastAPI** backend on `http://localhost:8000`
 
+### Local AIS Receiver (Optional)
+
+You can feed your own AIS ship data into ShadowBroker using an RTL-SDR dongle and [AIS-catcher](https://github.com/jvde-github/AIS-catcher), an open-source AIS decoder. This gives you real-time coverage of vessels in your local area — no API key needed.
+
+1. Plug in an RTL-SDR dongle
+2. Install AIS-catcher ([releases](https://github.com/jvde-github/AIS-catcher/releases)) or use the Docker image:
+   ```bash
+   docker run -d --device /dev/bus/usb \
+     ghcr.io/jvde-github/ais-catcher -H http://host.docker.internal:4000/api/ais/feed interval 10
+   ```
+3. Or run natively:
+   ```bash
+   AIS-catcher -H http://localhost:4000/api/ais/feed interval 10
+   ```
+
+AIS-catcher decodes VHF radio signals on 161.975 MHz and 162.025 MHz and POSTs decoded vessel data to ShadowBroker every 10 seconds. Ships detected by your SDR antenna appear alongside the global AIS stream.
+
+**Docker (ARM/Raspberry Pi):** See [docker-shipfeeder](https://github.com/sdr-enthusiasts/docker-shipfeeder) for a production-ready Docker image optimized for ARM.
+
+**Note:** AIS range depends on your antenna — typically 20-40 nautical miles with a basic setup, 60+ nm with a marine VHF antenna at elevation.
+
 ---
 
 ## 🎛️ Data Layers
@@ -459,6 +480,7 @@ All layers are independently toggleable from the left panel:
 | Carriers / Mil / Cargo | ✅ ON | Navy carriers, cargo ships, tankers |
 | Civilian Vessels | ❌ OFF | Yachts, fishing, recreational |
 | Cruise / Passenger | ✅ ON | Cruise ships and ferries |
+| Tracked Yachts | ✅ ON | Billionaire & oligarch superyachts (Yacht-Alert DB) |
 | Earthquakes (24h) | ✅ ON | USGS seismic events |
 | CCTV Mesh | ❌ OFF | Surveillance camera network |
 | Ukraine Frontline | ✅ ON | Live warfront positions |