Add WebRTC support and remove deviceId from apis

server/internal/transport/codec.go

@@ -239,6 +239,19 @@ type VersionResponse struct {
 	Version string `json:"version" example:"0.1.0-poc"`
 }
 
+// WebRTCConnectRequest is the body of the WebRTC connection API.
+type WebRTCConnectRequest struct {
+	SDP      string `json:"sdp"`
+	Type     string `json:"type" example:"offer"`
+	DriverID string `json:"driver_id" example:"driver-alice"`
+}
+
+// WebRTCConnectResponse is the response to WebRTCConnectRequest.
+type WebRTCConnectResponse struct {
+	SDP  string `json:"sdp"`
+	Type string `json:"type" example:"answer"`
+}
+
 // LobbyDriver is the wire form of lobby.DriverMeta.
 type LobbyDriver struct {
 	ID          string `json:"id"`
@@ -249,7 +262,6 @@ type LobbyDriver struct {
 	LastSeenMs  int64  `json:"last_seen_ms"`
 	Country     string `json:"country,omitempty"`
 	AvatarHue   int    `json:"avatar_hue,omitempty"`
-	DeviceID    *int   `json:"device_id,omitempty"`
 }
 
 // LobbySnapshot is the full lobby state, broadcast on change.