feat: apply suggestions from code review

Co-authored-by: wwestgarth <[email protected]>

protos/sources/data-node/api/v2/trading_data.proto

@@ -2686,17 +2686,14 @@ message ListLiquidityProvidersResponse {
 
 // Paid liquidity fees request.
 message ListPaidLiquidityFeesRequest {
-  // Market ID to get paid liquidity fee statistics for.
-  // If omitted the statistics for all markets will be returned.
+  // Restrict fee statistics to those generated by the given markets.
   optional string market_id = 1;
-  // Asset ID to get paid liquidity fee statistics for.
-  // If omitted the statistics for all assets will be returned.
+  // Restrict fee statistics to those paid in the given assets.
   optional string asset_id = 2;
   // Epoch to get paid liquidity fee statistics for.
   // If omitted, the last epoch published is used.
   optional uint64 epoch_seq = 3;
-  // Restrict the paid liquidity fees to those owned by the parties in this list.
-  // Pass an empty list for no filter.
+  // Restrict fee statistics to those paid to the given parties.
   repeated string party_ids = 4;
   // Pagination information to limit the data that is returned.
   optional Pagination pagination = 5;