Unicast mDNS queries (direct to IP:5353) are ignored by some HomeKit
devices. Switch to multicast (224.0.0.251:5353) and filter responses
by sender IP. Also consider mDNS response as reachability signal.
Split probe timeouts: 100ms for ports/DNS/HTTP, 120ms total to give
mDNS extra time. HomeKit responds in ~0.2ms via multicast.
Complete architecture rewrite following go2rtc patterns:
- pkg/ for pure logic (camdb, tester, probe, generate)
- internal/ for application glue with Init() modules
- Single HTTP server on :4567 with all endpoints
- zerolog with password masking and memory ring buffer
- Environment-based config only (no YAML files)
API endpoints: /api/search, /api/streams, /api/test,
/api/probe, /api/generate, /api/health, /api/log
Dependencies: go2rtc v1.9.14, go-sqlite3, miekg/dns, zerolog
eduard256