Rename sampled_at to sampled_time in metrics and sensor metrics

Signed-off-by: Tiyash Basu <[email protected]>

Author: tiyash-basu-frequenz

RELEASE_NOTES.md

@@ -34,6 +34,7 @@
 - Renamed `ElectricalComponentState` to `ElectricalComponentStateSnapshot` to better reflect its purpose.
 - Renamed `SensorState` to `SensorStateSnapshot` to better reflect its purpose.
 - Renamed `sampled_at` timestamps for state snapshots to `origin_time`.
+- Renamed `sampled_at` timestamps for metric samples to `sampled_time`.
 
 ## Bug Fixes
 

proto/frequenz/api/common/v1/metrics/metrics.proto

@@ -186,7 +186,7 @@ enum Metric {
 //     command, clients need to request current values within the bounds.
 message MetricSample {
   // The UTC timestamp of when the metric was sampled.
-  google.protobuf.Timestamp sampled_at = 1;
+  google.protobuf.Timestamp sampled_time = 1;
 
   // The metric that was sampled.
   Metric metric = 2;

proto/frequenz/api/common/v1/microgrid/electrical_components/electrical_components.proto

@@ -524,13 +524,13 @@ message ElectricalComponentStateSnapshot {
 //      metric_samples: [
 //        /* list of metrics for multiple timestamps */
 //        {
-//          sampled_at: "2023-10-01T00:00:00Z",
+//          sampled_time: "2023-10-01T00:00:00Z",
 //          metric: "DC_VOLTAGE_V",
 //          value: {},
 //          bounds: {},
 //        },
 //        {
-//          sampled_at: "2023-10-01T00:00:00Z",
+//          sampled_time: "2023-10-01T00:00:00Z",
 //          metric: "DC_VOLTAGE_V",
 //          value: {},
 //          bounds: {},
@@ -539,13 +539,13 @@ message ElectricalComponentStateSnapshot {
 //      states: [
 //        /* list of states for multiple timestamps */
 //        {
-//          sampled_at: "2023-10-01T00:00:00Z",
+//          sampled_time: "2023-10-01T00:00:00Z",
 //          states: [],
 //          warnings: [],
 //          errors: [],
 //        },
 //        {
-//          sampled_at: "2023-10-01T00:00:00Z",
+//          sampled_time: "2023-10-01T00:00:00Z",
 //          states: [],
 //          warnings: [],
 //          errors: [],

proto/frequenz/api/common/v1/microgrid/sensors/sensors.proto

@@ -210,7 +210,7 @@ message SensorStateSnapshot {
 // Representation of a sampled sensor metric along with its value.
 message SensorMetricSample {
   // The UTC timestamp of when the metric was sampled.
-  google.protobuf.Timestamp sampled_at = 1;
+  google.protobuf.Timestamp sampled_time = 1;
 
   // The metric that was sampled.
   frequenz.api.common.v1.metrics.Metric metric = 2;
@@ -230,19 +230,19 @@ message SensorMetricSample {
 //      metric_samples: [
 //        /* list of metrics for multiple timestamps */
 //        {
-//          sampled_at: "2023-10-01T00:00:00Z",
+//          sampled_time: "2023-10-01T00:00:00Z",
 //          metric: "METRIC_SENSOR_TEMPERATURE",
 //          value: metric_value_variant: {simple_metric: {value: 23.5},
 //        },
 //        {
-//          sampled_at: "2023-10-01T00:00:00Z",
+//          sampled_time: "2023-10-01T00:00:00Z",
 //          metric: "METRIC_SENSOR_RELATIVE_HUMIDITY",
 //          value: metric_value_variant: {simple_metric: {value: 23.5},
 //        }
 //      ],
 //      states: [
 //        {
-//          sampled_at: "2023-10-01T00:00:00Z",
+//          sampled_time: "2023-10-01T00:00:00Z",
 //          states: [],
 //          errors: [],
 //        },