Updated measurements endpoint with new timezone column statement

  Also added test to catch the underlying issue

openaq_api/openaq_api/v3/routers/measurements.py

@@ -349,6 +349,9 @@ async def sensor_yearly_get(
 
 
 async def fetch_measurements(query, db):
+
+    query.set_column_map({"timezone": "tz.tzid"})
+
     sql = f"""
       SELECT m.sensors_id
        , value

openaq_api/tests/test_sensor_measurements.py

@@ -20,6 +20,10 @@ def test_default_good(self, client):
         data = json.loads(response.content).get('results', [])
         assert len(data) > 0, "response did not have at least one record"
 
+    def test_date_filter_good(self, client):
+        response = client.get(f"/v3/sensors/{sensors_id}/measurements?datetime_from=2023-03-06")
+        assert response.status_code == 200
+
     def test_aggregated_hourly_good(self, client):
         response = client.get(f"/v3/sensors/{sensors_id}/measurements/hourly")
         assert response.status_code == 200