fix: replace bare except with except Exception in task_finished

[Talha8899]

Problem

In slurm_decorator.py, the task_finished method
uses a bare except: clause when terminating the
log sidecar:

try:
self._save_logs_sidecar.terminate()
except:
# Best effort kill
pass

A bare except: catches everything including
KeyboardInterrupt and SystemExit which should
never be silently ignored.

Fix

Replace bare except: with except Exception:
which only catches actual exceptions and lets
system signals pass through correctly.

Testing

Manually verified the change does not affect
normal execution flow.