Add fuse component category

The new variant is called `COMPONENT_CATEGORY_FUSE`.
Fuses are used to protect electrical components from overcurrents.

This change allows our API to support fuses. E.g., the Microgrid API could
be extended to support fuses in component graphs.

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

Author: tiyash-basu-frequenz

RELEASE_NOTES.md

@@ -12,7 +12,7 @@
 
 ## New Features
 
-<!-- Here goes the main new features and examples or instructions on how to use them -->
+- Added a new component category variant: `COMPONENT_CATEGORY_FUSE`.
 
 ## Bug Fixes
 

proto/frequenz/api/common/v1/components.proto

@@ -60,6 +60,10 @@ enum ComponentCategory {
   // mechanisms, some may lack this feature. In such cases, we need to use
   // external precharging modules.
   COMPONENT_CATEGORY_PRECHARGE_MODULE = 12;
+
+  // A fuse.
+  // Fuses are used to protect electrical components from overcurrents.
+  COMPONENT_CATEGORY_FUSE = 13;
 }
 
 // Enumerated battery types.