Add HTTP prober, optimize mDNS timeout, add Trassir/ZOSI to OUI

- Add HTTPProber: parallel HEAD+GET on ports 80/8080, extracts Server header
- Reduce mDNS timeout from 1s to 100ms using context wrapper around
  mdns.Query (HomeKit devices respond in 2-10ms, no need to wait 1s)
- Add Trassir (F0:23:B9) and ZOSI (00:05:FE) to camera OUI database
- Probe response time improved from ~1s to ~110ms for reachable devices

internal/camera/discovery/probe.go

@@ -146,6 +146,10 @@ func (s *ProbeService) Probe(ctx context.Context, ip string) *models.ProbeRespon
 			if v, ok := r.data.(*models.MDNSProbeResult); ok {
 				response.Probes.MDNS = v
 			}
+		case "http":
+			if v, ok := r.data.(*models.HTTPProbeResult); ok {
+				response.Probes.HTTP = v
+			}
 		}
 	}