Merge pull request #19468 from k8s-infra-cherrypick-robot/cherry-pick-19446-to-release-3.6

[release-3.6] etcdserver: Update description for count field in the RangeResponse message

Author: ahrtr

Documentation/dev-guide/apispec/swagger/rpc.swagger.json

@@ -2702,7 +2702,7 @@
         "count": {
           "type": "string",
           "format": "int64",
-          "description": "count is set to the number of keys within the range when requested."
+          "description": "count is set to the actual number of keys within the range when requested.\nUnlike Kvs, it is unaffected by limits and filters (e.g., Min/Max, Create/Modify, Revisions)\nand reflects the full count within the specified range."
         }
       }
     },

api/etcdserverpb/rpc.pb.go

@@ -507,7 +507,9 @@ message RangeResponse {
   repeated mvccpb.KeyValue kvs = 2;
   // more indicates if there are more keys to return in the requested range.
   bool more = 3;
-  // count is set to the number of keys within the range when requested.
+  // count is set to the actual number of keys within the range when requested.
+  // Unlike Kvs, it is unaffected by limits and filters (e.g., Min/Max, Create/Modify, Revisions)
+  // and reflects the full count within the specified range.
   int64 count = 4;
 }