fix: validator check for integers was broken. (#381)

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## Summary by CodeRabbit

* **Bug Fixes**
* Validation updated for the initialization delay before status checks:
integer values of 1 and above are now accepted, whereas previously only
zero or negative values were allowed. Type checking remains enforced so
only integers are permitted.

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Author: cmeesters

snakemake_executor_plugin_slurm/validation.py

@@ -132,7 +132,7 @@ def validate_executor_settings(settings, logger=None):
     if settings.init_seconds_before_status_checks is not None:
         if (
             not isinstance(settings.init_seconds_before_status_checks, int)
-            or settings.init_seconds_before_status_checks > 0
+            or settings.init_seconds_before_status_checks < 1
         ):
             raise WorkflowError(
                 "init-seconds-before-status-checks must be a positive integer."