fix: permission denied from target process

[flaviut]

I was seeing this error when running the app before:

blueman-tray 18.55.55 WARNING  <string>:34 __payload_entrypoint_d8d612b3_f4e9_4fbf_89a3_70d5a7efa920: XXX: dump_heap: writing report to '/tmp/dump-heap-dQcU4l/output'
blueman-tray 18.55.55 WARNING  <string>:35 __payload_entrypoint_d8d612b3_f4e9_4fbf_89a3_70d5a7efa920: XXX: dump_heap: collecting gc
blueman-tray 18.55.55 WARNING  <string>:43 __payload_entrypoint_d8d612b3_f4e9_4fbf_89a3_70d5a7efa920: XXX: dump_heap: collected gc
blueman-tray 18.55.55 ERROR    <string>:379 __payload_entrypoint_d8d612b3_f4e9_4fbf_89a3_70d5a7efa920: XXX: dump_heap: failed to collect
Traceback (most recent call last):
  File "<string>", line 293, in __payload_entrypoint_d8d612b3_f4e9_4fbf_89a3_70d5a7efa920
PermissionError: [Errno 13] Permission denied: '/tmp/dump-heap-dQcU4l/output'
Exception in thread Thread-5 (__wrapper):
Traceback (most recent call last):
  File "/usr/lib/python3.14/threading.py", line 1082, in _bootstrap_inner
    self._context.run(self.run)
    ~~~~~~~~~~~~~~~~~^^^^^^^^^^
  File "/usr/lib/python3.14/threading.py", line 1024, in run
    self._target(*self._args, **self._kwargs)
    ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<string>", line 412, in __wrapper
PermissionError: [Errno 13] Permission denied: '/tmp/dump-heap-dQcU4l/done'