refactor(exceptions): display startup errors as ClickException

Author: fubuloubu

silverback/exceptions.py

@@ -44,7 +44,7 @@ def __init__(self):
 
 
 # TODO: `ExceptionGroup` added in Python 3.11
-class StartupFailure(SilverbackException):
+class StartupFailure(SilverbackException, click.ClickException):
     def __init__(self, *exceptions: BaseException | str | None):
         if len(exceptions) == 1 and isinstance(exceptions[0], str):
             super().__init__(exceptions[0])
@@ -54,7 +54,7 @@ def __init__(self, *exceptions: BaseException | str | None):
             super().__init__("Startup failure(s) detected. See logs for details.")
 
 
-class NoTasksAvailableError(SilverbackException):
+class NoTasksAvailableError(StartupFailure):
     def __init__(self):
         super().__init__("No tasks to execute")