moved all validation and parsing from handler to service layer

internal/domains/sensors/domain.go

@@ -106,6 +106,8 @@ func (r *SensorDataRequest) Validate() error {
 }
 
 var (
+	ErrRegisteringSensor       = errors.New("error registering sensor")
+	ErrUpdatingSensor          = errors.New("error updating sensor")
 	ErrInvalidSensorIdentifier = errors.New("sensor identifier is required")
 	ErrInvalidSensorType       = errors.New("sensor type is required")
 	ErrSensorNotFound          = errors.New("sensor not found")