Add memory diagnostics and optimize PSRAM usage

src/ssh_console.c

@@ -94,6 +94,10 @@ static int show_status(bool sessions_only)
                    esp_err_to_name(username_error));
         }
         printf("Admission: shell/PTY only; exec, subsystem, forwarding, SCP, and SFTP disabled\n");
+        printf("Owner task: core=%" PRId32 " stack=%" PRIu32
+               " minimum-free=%" PRIu32 " bytes\n",
+               snapshot.task_core_id, snapshot.task_stack_size,
+               snapshot.task_stack_free_minimum);
     }
     return print_sessions(&snapshot);
 }