Use surrogate peer IDs instead of FDs

src/osd/osd_primary_write.cpp

@@ -545,7 +545,7 @@ lazy:
         }
         // Remember PG as dirty to drop the connection when PG goes offline
         // (this is required because of the "lazy sync")
-        auto cl_it = msgr.clients.find(cur_op->peer_fd);
+        auto cl_it = msgr.clients.find(cur_op->client_id);
         if (cl_it != msgr.clients.end())
         {
             cl_it->second->dirty_pgs.insert({ .pool_id = pg.pool_id, .pg_num = pg.pg_num });