cmd: bind publish timeout on exit

[gsora]

Allow exit commands to specify a publish timeout.

category: bug ticket: none

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Project coverage is 56.76%. Comparing base (ed1d55a) to head (e12eb66).

Files	Patch %	Lines
cmd/exit_broadcast.go	0.00%	1 Missing :warning:
cmd/exit_fetch.go	0.00%	1 Missing :warning:
cmd/exit_sign.go	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #3127 +/- ## ========================================== - Coverage 56.77% 56.76% -0.01% ========================================== Files 208 208 Lines 29305 29308 +3 ========================================== - Hits 16637 16636 -1 - Misses 10831 10832 +1 - Partials 1837 1840 +3 ```

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