fix(observability): preserve shared SigNoz operation lock

scripts/ops/tests/test_signoz_metadata_toolchain_deploy.py

@@ -165,6 +165,15 @@ def test_deployer_has_no_active_pointer_or_destructive_fallback() -> None:
     assert "ln -s" not in source
 
 
+def test_shared_operation_lock_is_existing_read_only_and_fail_closed() -> None:
+    source = DEPLOYER.read_text(encoding="utf-8")
+    assert "OPERATION_LOCK=/tmp/awoooi-signoz-backup-operation.lock" in source
+    assert '[ -f "${OPERATION_LOCK}" ] && [ ! -L "${OPERATION_LOCK}" ]' in source
+    assert 'exec 8<"${OPERATION_LOCK}"' in source
+    assert "flock -n 8" in source
+    assert "exec 8>>/tmp/awoooi-signoz-backup-operation.lock" not in source
+
+
 def test_exact_five_file_supply_chain_and_modes_are_fixed() -> None:
     source = DEPLOYER.read_text(encoding="utf-8")
     for path in (