addressed the comments

Author: xianshijing-lk

protobufs/livekit_models.proto

@@ -451,9 +451,9 @@ message ChatMessage {
   bool generated = 6; // true if the chat message has been generated by an agent from a participant's audio transcription
 }
 
-enum RpcPayloadType {
-  UNCOMPRESSED = 0;
-  GZIP = 1;
+enum RpcPayloadFormat {
+  RPF_UNKNOWN = 0;
+  RPF_GZIP = 1;
 }
 
 message RpcRequest {
@@ -464,8 +464,8 @@ message RpcRequest {
   uint32 version = 5;
   // Compressed payload data. When set, this field is used instead of `payload`.
   bytes compressed_payload = 6;
-  // Indicates the compression type used for compressed_payload.
-  RpcPayloadType payload_type = 7;
+  // Indicates the compression format used for compressed_payload.
+  RpcPayloadFormat compressed_payload_format = 7;
 }
 
 message RpcAck {
@@ -480,8 +480,8 @@ message RpcResponse {
     // Compressed payload data. When set, this field is used instead of `payload`.
     bytes compressed_payload = 4;
   }
-  // Indicates the compression type used for compressed_payload.
-  RpcPayloadType payload_type = 5;
+  // Indicates the compression format used for compressed_payload.
+  RpcPayloadFormat compressed_payload_format = 5;
 }
 
 message RpcError {