v0.3.0

- **Smaller container images** - blah2 stack reduced from ~12GB to ~4GB using slim runtime stages
- **Simplified architecture** - Removed redundant readsb container (now built into tar1090)
- **Fixed port conflicts** - tar1090 moved to port 8078, proxy moved to 3005, freeing port 80 for retina-gui
- **mDNS/IPv6 support** - Fixed .local hostname resolution across the stack

- Bump blah2 to v0.2.6 (slim runtime, fixed binary path)
- Bump blah2-web/api/host to v0.2.6
- Bump tar1090-node to v0.2.0
- Bump config-merger to v0.3.1
- Bump adsb2dd to v0.1.3
- Config-merger now uses location.rx for tar1090 receiver position
- Disable detection saving by default to prevent SD card fill-up
- README updates with new ports and SSH access instructions

| Service | Port |
|---------|------|
| retina-gui | 80 (available) |
| blah2-host | 8080 |
| tar1090 | 8078 |
| blah2-web | 49152 |
| adsb.lol proxy | 3005 |