refactor: rename for intent (L3)

PostChangeResult is PostSaveFollowUp (the after-save pipeline, not a
result); DiviChange::changed() is record() (moved nodes are recorded but
not touched). cleanValue/withoutControls were renamed in wave 2.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01At3V6SjwbMe6eMzVGW3Hs7

tests/Unit/Integrations/Divi/Pages/DiviChangeTest.php

@@ -19,9 +19,9 @@ final class DiviChangeTest extends TestCase
         ));
         $row = $index->find('s0.r0');
         $change = (new DiviChange('x'))
-            ->changed($row, 'updated')
+            ->record($row, 'updated')
             ->removed('s3.r1', Block::create('divi/row'))
-            ->changed(Block::create('divi/text'), 'inserted');
+            ->record(Block::create('divi/text'), 'inserted');
 
         self::assertSame(
             ['s0.r0', 's3.r1', null],