Add Fitbit intraday spo2 to schemas and specs

commons/connector/fitbit/fitbit_intraday_spo2.avsc

@@ -0,0 +1,12 @@
+{
+  "namespace": "org.radarcns.connector.fitbit",
+  "type": "record",
+  "name": "FitbitIntradaySpo2",
+  "doc": "Intra day spo2 data from fitbit device.",
+  "fields": [
+    { "name": "time", "type": "double", "doc": "Device timestamp in UTC (s)." },
+    { "name": "timeReceived", "type": "double", "doc": "Time that the data was received from the Fitbit API (seconds since the Unix Epoch)." },
+    { "name": "timeInterval", "type": "int", "doc":  "Chronological window size (s)." },
+    { "name": "spo2", "type": "float", "doc": "Percentage value of SpO2 calculated at the specific time."}
+  ]
+}

specifications/connector/radar-fitbit-connector.yml

@@ -37,3 +37,6 @@ data:
   - doc: Skin temperature
     topic: connect_fitbit_skin_temperature
     value_schema: .connector.fitbit.FitbitSkinTemperature
+  - doc: Spo2 or Blood oxygen saturation
+    topic: connect_fitbit_intraday_spo2
+    value_schema: .connector.fitbit.FitbitIntradaySpo2