fix: pass SequenceReader by ref in MySql and fix compiler errors

Author: vkuttyp

src/CosmoSQLClient.MySql/MySqlConnection.cs

@@ -190,7 +190,8 @@ public async Task<IReadOnlyList<SqlRow>> QueryAsync(string sql, IReadOnlyList<Sq
                 // Binary Protocol (COM_STMT_PREPARE + COM_STMT_EXECUTE)
                 await SendPacketAsync(MyStmtPrepareMessage.Build(sql), 0, ct).ConfigureAwait(false);
                 var prepResp = await ReceivePacketAsync(ct).ConfigureAwait(false);
-                if (prepResp.First.Span[0] == 0xFF) throw SqlException.Query(MyDecoder.DecodeError(prepResp).Message);
+                var reader = new SequenceReader<byte>(prepResp);
+                if (prepResp.First.Span[0] == 0xFF) throw SqlException.Query(MyDecoder.DecodeError(ref reader).Message);
 
                 // Decode stmt-id (4 bytes starting at offset 1)
                 uint stmtId = prepResp.ToArray()[1] | ((uint)prepResp.ToArray()[2] << 8) | ((uint)prepResp.ToArray()[3] << 16) | ((uint)prepResp.ToArray()[4] << 24);
@@ -212,7 +213,8 @@ public async Task<IReadOnlyList<SqlRow>> QueryAsync(string sql, IReadOnlyList<Sq
 
                 await SendPacketAsync(MyStmtExecuteMessage.Build(stmtId, parameters), 0, ct).ConfigureAwait(false);
                 var execResp = await ReceivePacketAsync(ct).ConfigureAwait(false);
-                if (execResp.First.Span[0] == 0xFF) throw SqlException.Query(MyDecoder.DecodeError(execResp).Message);
+                var execReader = new SequenceReader<byte>(execResp);
+                if (execResp.First.Span[0] == 0xFF) throw SqlException.Query(MyDecoder.DecodeError(ref execReader).Message);
 
                 // Row decoding for Binary Protocol is different (binary rows), 
                 // but for now let's assume text protocol for simplicity or implement binary rows.