fix(ci): resolve ruff lint issues in ACMS context benchmark

- Move contextlib import to top of file (E402 fix)
- Use contextlib.suppress(SystemExit) instead of try/except/pass blocks

benchmarks/acms_context_cli_bench.py

@@ -8,6 +8,7 @@ Measures the performance of:
 
 from __future__ import annotations
 
+import contextlib
 import importlib
 import sys
 from pathlib import Path
@@ -76,11 +77,9 @@ def _run_show_silent(view: str, fragments: list[Any]) -> None:
             "cleveragents.cli.renderers._get_console",
             return_value=mock_console,
         ),
+        contextlib.suppress(SystemExit),
     ):
-        try:
-            acms_context_show(view)
-        except SystemExit:
-            pass
+        acms_context_show(view)
 
 
 def _run_clear_silent(
@@ -102,11 +101,9 @@ def _run_clear_silent(
             "cleveragents.cli.renderers._get_console",
             return_value=mock_console,
         ),
+        contextlib.suppress(SystemExit),
     ):
-        try:
-            acms_context_clear(tier=tier, yes=True)
-        except SystemExit:
-            pass
+        acms_context_clear(tier=tier, yes=True)
 
 
 class FormatBudgetUtilizationSuite: