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/SchemaFixture.php

@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace LIT\MCP\Tests\Support;
+
+use LIT\MCP\Integrations\WordPress\Schema\ContentSchema;
+use Mockery;
+use Mockery\MockInterface;
+
+/** ContentSchema stand-ins for ability tests. */
+final class SchemaFixture
+{
+    /**
+     * Every post type is managed. $divi answers diviEnabled(); null = the test does not expect
+     * that question (a call fails the test, as with a plain mock).
+     *
+     * @return ContentSchema&MockInterface
+     */
+    public static function managed(?bool $divi = null): ContentSchema
+    {
+        $schema = Mockery::mock(ContentSchema::class);
+        $schema->allows('isManaged')->andReturn(true);
+        if ($divi !== null) {
+            $schema->allows('diviEnabled')->andReturn($divi);
+        }
+
+        return $schema;
+    }
+}