feat: include self-reported tx_power in measurement calls

lib/localiser/rssi_buffer.ex

@@ -6,7 +6,7 @@ defmodule Localiser.RSSI.Buffer do
 
   @flush_interval_ms 500
 
-  # reading :: %{sensor_id: String.t(), tag_id: String.t(), rssi: integer()}
+  # reading :: %{sensor_id: String.t(), tag_id: String.t(), rssi: integer(), tx_power: integer() | nil}
   def push(reading) do
     GenServer.cast(__MODULE__, {:push, reading})
   end
@@ -50,14 +50,14 @@ defmodule Localiser.RSSI.Buffer do
   # If the sensor is in calibration mode, feeds the reading to Sensor.Server instead
   # and returns [] so the sample is excluded from Tag.Filter measurements.
   # If the sensor server isn't running, returns [].
-  defp resolve_measurement(%{sensor_id: sensor_id, rssi: rssi}) do
+  defp resolve_measurement(%{sensor_id: sensor_id, rssi: rssi, tx_power: tx_power}) do
     case Registry.lookup(Localiser.Registry, {:sensor, sensor_id}) do
       [{_pid, _}] ->
         if SensorServer.calibrating?(sensor_id) do
           SensorServer.calibration_reading(sensor_id, rssi)
           []
         else
-          [SensorServer.measure(sensor_id, rssi)]
+          [SensorServer.measure(sensor_id, rssi, tx_power)]
         end
 
       [] ->