Improve odometry with rotation estimation, daemon stability, and RTSP fixes

- Add rotation estimation via log-polar phase correlation (EstimateRotation,
  rotateGray) — de-rotate before translation to avoid aliasing
- Track cumulative field rotation in Tracker, reject low-confidence frames
- Extract RTSP grabber into internal/rtspgrab module
- Daemon: pause odometry during slew (motion blur), auto-resume after settle
  delay, add /pause and /resume HTTP endpoints, switch shooting mode before
  opening camera, use ReqOpenCamera with rtsp_encode_type=1
- WebSocket heartbeat (ping/pong every 10s) to prevent idle disconnects
- FFmpeg low-latency flags (-fflags nobuffer, -probesize, -analyzeduration)
- Add SendRaw API for custom payloads, increase daemon HTTP timeout to 60s

💘 Generated with Crush

Assisted-by: Crush:/models/Qwen3.6-27B-uncensored-heretic-v2-Native-MTP-Preserved-Q4_K_M.gguf

dwarfctl/internal/daemon/client.go

@@ -24,7 +24,7 @@ func NewClient(addr string) *Client {
 	}
 	return &Client{
 		baseURL: "http://" + addr,
-		http:    &http.Client{Timeout: 30 * time.Second},
+		http:    &http.Client{Timeout: 60 * time.Second},
 	}
 }