test: FakeChangeLog and SchemaFixture instead of repeated mocks (T2)

- tests/Support/FakeChangeLog extends ChangeLog: records record()/recordPartial()
  calls, increasing ids, optional failure; new FakeChangeLog(id) / partialsOnly() /
  any(id) / forbidden() mirror what the replaced mocks allowed. assertRecorded() /
  assertPartials() check count and the named arguments. Calls a fake does not allow
  throw and are also verified in TestCase::tearDown (one assertion per test that
  uses a fake), so swallowed change-log calls still fail like a never() expectation.
- All ChangeLog mocks of ability/integration tests replaced (the admin tests that
  stub query/purge/clear keep their mocks); expectException tests that checked the
  partial log now catch and assert.
- SchemaFixture::managed(?divi) replaces the 21 isManaged-only ContentSchema mocks;
  DiviFixtures::schema() uses it.
Tests 1397 -> 1404 (FakeChangeLogTest); no test has fewer assertions.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

tests/Support/DiviFixtures.php

@@ -8,7 +8,6 @@ use Brain\Monkey\Functions;
 use LIT\MCP\Integrations\Divi\Design\DesignSystem;
 use LIT\MCP\Integrations\Divi\Schema\ModuleCatalog;
 use LIT\MCP\Integrations\WordPress\Schema\ContentSchema;
-use Mockery;
 use WP_Post;
 
 /**
@@ -41,11 +40,7 @@ final class DiviFixtures
 
     public static function schema(bool $diviEnabled = true): ContentSchema
     {
-        $schema = Mockery::mock(ContentSchema::class);
-        $schema->allows('isManaged')->andReturn(true);
-        $schema->allows('diviEnabled')->andReturn($diviEnabled);
-
-        return $schema;
+        return SchemaFixture::managed($diviEnabled);
     }
 
     /** Shapes as GlobalData / GlobalPreset return them (Divi 5.2.1, verified in DDEV). */