Rename metric variants to follow a consistent naming scheme

This commit renames the metric variants in `metrics.proto` to follow a
more consistent naming scheme. The new naming convention uses a
core-concept to modifier format, which improves clarity and consistency
across the metric definitions.

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

Author: tiyash-basu-frequenz

RELEASE_NOTES.md

@@ -54,6 +54,17 @@
 
 - The minimum allowed version of `protobuf` and `grpcio` has been updated to 6.31.1 and 1.72.1 respectively, you might also need to bump your dependencies accordingly.
 
+- Renamed metric variants to follow a more consistent naming scheme of core-concept to modifier:
+
+  - `metrics.MetricVariant`:
+
+    - `METRIC_AC_APPARENT_POWER*` to `METRIC_AC_POWER_APPARENT*`
+    - `METRIC_AC_ACTIVE_POWER*` to `METRIC_AC_POWER_ACTIVE*`
+    - `METRIC_AC_REACTIVE_POWER*` to `METRIC_AC_POWER_REACTIVE*`
+    - `METRIC_AC_APPARENT_ENERGY*` to `METRIC_AC_ENERGY_APPARENT*`
+    - `METRIC_AC_ACTIVE_ENERGY*` to `METRIC_AC_ENERGY_ACTIVE*`
+    - `METRIC_AC_REACTIVE_ENERGY*` to `METRIC_AC_ENERGY_REACTIVE*`
+
 ## New Features
 
 Added many new messages and enum values:

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

@@ -101,18 +101,18 @@ enum Metric {
   METRIC_AC_CURRENT_PHASE_3 = 21;
 
   // AC power metrics
-  METRIC_AC_APPARENT_POWER = 22;
-  METRIC_AC_APPARENT_POWER_PHASE_1 = 23;
-  METRIC_AC_APPARENT_POWER_PHASE_2 = 24;
-  METRIC_AC_APPARENT_POWER_PHASE_3 = 25;
-  METRIC_AC_ACTIVE_POWER = 26;
-  METRIC_AC_ACTIVE_POWER_PHASE_1 = 27;
-  METRIC_AC_ACTIVE_POWER_PHASE_2 = 28;
-  METRIC_AC_ACTIVE_POWER_PHASE_3 = 29;
-  METRIC_AC_REACTIVE_POWER = 30;
-  METRIC_AC_REACTIVE_POWER_PHASE_1 = 31;
-  METRIC_AC_REACTIVE_POWER_PHASE_2 = 32;
-  METRIC_AC_REACTIVE_POWER_PHASE_3 = 33;
+  METRIC_AC_POWER_APPARENT = 22;
+  METRIC_AC_POWER_APPARENT_PHASE_1 = 23;
+  METRIC_AC_POWER_APPARENT_PHASE_2 = 24;
+  METRIC_AC_POWER_APPARENT_PHASE_3 = 25;
+  METRIC_AC_POWER_ACTIVE = 26;
+  METRIC_AC_POWER_ACTIVE_PHASE_1 = 27;
+  METRIC_AC_POWER_ACTIVE_PHASE_2 = 28;
+  METRIC_AC_POWER_ACTIVE_PHASE_3 = 29;
+  METRIC_AC_POWER_REACTIVE = 30;
+  METRIC_AC_POWER_REACTIVE_PHASE_1 = 31;
+  METRIC_AC_POWER_REACTIVE_PHASE_2 = 32;
+  METRIC_AC_POWER_REACTIVE_PHASE_3 = 33;
 
   // AC Power factor
   METRIC_AC_POWER_FACTOR = 40;
@@ -121,26 +121,26 @@ enum Metric {
   METRIC_AC_POWER_FACTOR_PHASE_3 = 43;
 
   // AC energy metrics
-  METRIC_AC_APPARENT_ENERGY = 50;
-  METRIC_AC_APPARENT_ENERGY_PHASE_1 = 51;
-  METRIC_AC_APPARENT_ENERGY_PHASE_2 = 52;
-  METRIC_AC_APPARENT_ENERGY_PHASE_3 = 53;
-  METRIC_AC_ACTIVE_ENERGY = 54;
-  METRIC_AC_ACTIVE_ENERGY_PHASE_1 = 55;
-  METRIC_AC_ACTIVE_ENERGY_PHASE_2 = 56;
-  METRIC_AC_ACTIVE_ENERGY_PHASE_3 = 57;
-  METRIC_AC_ACTIVE_ENERGY_CONSUMED = 58;
-  METRIC_AC_ACTIVE_ENERGY_CONSUMED_PHASE_1 = 59;
-  METRIC_AC_ACTIVE_ENERGY_CONSUMED_PHASE_2 = 60;
-  METRIC_AC_ACTIVE_ENERGY_CONSUMED_PHASE_3 = 61;
-  METRIC_AC_ACTIVE_ENERGY_DELIVERED = 62;
-  METRIC_AC_ACTIVE_ENERGY_DELIVERED_PHASE_1 = 63;
-  METRIC_AC_ACTIVE_ENERGY_DELIVERED_PHASE_2 = 64;
-  METRIC_AC_ACTIVE_ENERGY_DELIVERED_PHASE_3 = 65;
-  METRIC_AC_REACTIVE_ENERGY = 66;
-  METRIC_AC_REACTIVE_ENERGY_PHASE_1 = 67;
-  METRIC_AC_REACTIVE_ENERGY_PHASE_2 = 68;
-  METRIC_AC_REACTIVE_ENERGY_PHASE_3 = 69;
+  METRIC_AC_ENERGY_APPARENT = 50;
+  METRIC_AC_ENERGY_APPARENT_PHASE_1 = 51;
+  METRIC_AC_ENERGY_APPARENT_PHASE_2 = 52;
+  METRIC_AC_ENERGY_APPARENT_PHASE_3 = 53;
+  METRIC_AC_ENERGY_ACTIVE = 54;
+  METRIC_AC_ENERGY_ACTIVE_PHASE_1 = 55;
+  METRIC_AC_ENERGY_ACTIVE_PHASE_2 = 56;
+  METRIC_AC_ENERGY_ACTIVE_PHASE_3 = 57;
+  METRIC_AC_ENERGY_ACTIVE_CONSUMED = 58;
+  METRIC_AC_ENERGY_ACTIVE_CONSUMED_PHASE_1 = 59;
+  METRIC_AC_ENERGY_ACTIVE_CONSUMED_PHASE_2 = 60;
+  METRIC_AC_ENERGY_ACTIVE_CONSUMED_PHASE_3 = 61;
+  METRIC_AC_ENERGY_ACTIVE_DELIVERED = 62;
+  METRIC_AC_ENERGY_ACTIVE_DELIVERED_PHASE_1 = 63;
+  METRIC_AC_ENERGY_ACTIVE_DELIVERED_PHASE_2 = 64;
+  METRIC_AC_ENERGY_ACTIVE_DELIVERED_PHASE_3 = 65;
+  METRIC_AC_ENERGY_REACTIVE = 66;
+  METRIC_AC_ENERGY_REACTIVE_PHASE_1 = 67;
+  METRIC_AC_ENERGY_REACTIVE_PHASE_2 = 68;
+  METRIC_AC_ENERGY_REACTIVE_PHASE_3 = 69;
 
   // AC harmonics
   METRIC_AC_TOTAL_HARMONIC_DISTORTION_CURRENT = 80;