assertTrue(result.success(), "Model upgrade should succeed");
            assertTrue(result.modifiedCount() > 0, "Should have upgraded phases");

            // Verify phases were upgraded
            verifyCleanPluginPhases(document);
            verifyFailsafePluginPhases(document);
            verifySitePluginPhases(document);
            verifyPluginManagementPhases(document);
            verifyProfilePhases(document);
        }