test: restore global log level after each SetLogLevel subtest

SetLogLevel mutates a process-global logger, leaking state into
subsequent tests and causing order-dependent failures. Save the
current level before each subtest and restore it via t.Cleanup.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

util/cli_test.go

@@ -97,6 +97,8 @@ func Test_setLogLevel(t *testing.T) {
 	}
 	for name, tt := range tests {
 		t.Run(name, func(t *testing.T) {
+			prev := log.GetLevel()
+			t.Cleanup(func() { log.SetLevel(prev) })
 			cmd := &cli.Command{
 				Name: "test",
 				Flags: []cli.Flag{