Extend bounded syntax repair retries

tests/test_config.py

@@ -70,4 +70,6 @@ def test_default_commands_initialize_disposable_laravel_schema(monkeypatch) -> N
 
 def test_agent_attempts_are_bounded() -> None:
     with pytest.raises(ValueError, match="MAX_AGENT_ATTEMPTS"):
-        settings(max_agent_attempts=4).validate()
+        settings(max_agent_attempts=6).validate()
+
+    settings(max_agent_attempts=5).validate()

tests/test_worker.py

@@ -169,6 +169,7 @@ def test_php_syntax_failure_discards_attempt_before_full_validation() -> None:
     assert "unexpected token" in worker.agent.run.call_args_list[1].args[1]
     assert "clean repository" in worker.agent.run.call_args_list[1].args[1]
     assert "intended fix" in worker.agent.run.call_args_list[1].args[1]
+    assert "repair-only attempt" in worker.agent.run.call_args_list[1].args[1]
     workspace.restore_checkpoint.assert_called_once_with(None)
     worker._run_tests.assert_called_once()