fix: 修复测试文件格式问题

- 修正测试文件中的换行符和格式
- 确保所有测试文件的一致性

api/persistence/cluster_safety_test.go

@@ -334,4 +334,3 @@ func TestClusterSafety_ConcurrentStatusUpdate(t *testing.T) {
 
 	t.Log("✅ CAS mechanism working correctly - Only one update succeeded")
 }
-

api/persistence/cursor_init_verification_test.go

@@ -286,4 +286,3 @@ func TestCursorInitialization(t *testing.T) {
 	t.Log("✅ Cursor initialization verification PASSED")
 	t.Log(strings.Repeat("=", 60))
 }
-

api/persistence/pg_query_integration_test.go

@@ -613,4 +613,3 @@ func TestPG_PersistenceClient_Query_Integration(t *testing.T) {
 func strPtr(s string) *string {
 	return &s
 }
-

api/persistence/query_test.go

@@ -287,4 +287,3 @@ func TestPersistenceClient_QueryOperations(t *testing.T) {
 		assert.Equal(t, StatusNotTrustlogged, status)
 	})
 }
-