ensure latched qos in gpio_controller is reliable

[rahatchd]

in case a user overrides the system default qos settings, the latched topics of gpio controller (robot_mode, safety_mode, etc) will be incompatible with a latched topic subscriber (transient local and reliable). this change ensures that gpio controller's latched topics are reliable.

[urfeex]

Thank you for the contribution. I can see that setting reliability to "reliable" might be a valid option. Your main concern is that since we publish new data only on state changes, users might miss messages if they set their system default to "best_effort", right?

[rahatchd]

that's right, as a subscriber i would want to guarantee i can receive the changes. and since a "reliable" publisher is compatible with "best_effort" subscriptions, this would support all subscribers

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 15.24%. Comparing base (1b121b7) to head (144a71c).
⚠️ Report is 527 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##            main    #1594       +/-   ##
==========================================
+ Coverage   3.59%   15.24%   +11.65%     
==========================================
  Files         13       34       +21     
  Lines        947     3897     +2950     
  Branches     152      469      +317     
==========================================
+ Hits          34      594      +560     
- Misses       843     3286     +2443     
+ Partials      70       17       -53     

Flag	Coverage Δ
unittests	15.24% <100.00%> (+11.65%)	⬆️

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