fix: never publish a missed schedule, refuse trashed posts, fail on meta read errors

- PostGuard::editable() refuses trashed entries unless the caller opts in
  (content-get, revisions-list, post-trash); publish/schedule/unpublish/update/
  restore/duplicate/replace now refuse them.
- PostGuard::statusStable(): content-update, revision-restore and
  replace-with-copy refuse a future post whose date has passed (any save would
  publish it); the content-update rollback and PostCloner row writes re-check.
- PostCloner::ownMeta() treats a failed SELECT as an error; replace() reads the
  copy before its first write.
- replace-with-copy needs create_posts (backup clone) and reports backup_id in
  write_failed/partial_write.

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

tests/Unit/Integrations/WordPress/Revisions/RevisionRestoreAbilityTest.php

@@ -76,6 +76,45 @@ final class RevisionRestoreAbilityTest extends TestCase
         self::assertArrayHasKey('revision_id', $error->get_error_data()['fields']);
     }
 
+    public function testATrashedEntryIsRefused(): void
+    {
+        Functions\when('get_post')->alias(static fn (int $id) => match ($id) {
+            810 => new WP_Post(['ID' => 810, 'post_type' => 'revision', 'post_parent' => 5]),
+            5 => new WP_Post(array_merge(self::CURRENT_POST, ['post_status' => 'trash'])),
+            default => null,
+        });
+        Functions\expect('wp_restore_post_revision')->never();
+
+        $error = $this->ability(Mockery::mock(ChangeLog::class))->execute(['revision_id' => 810, 'rev' => 'x', 'confirm' => true]);
+
+        self::assertSame('lit_validation_failed', $error->get_error_code());
+        self::assertArrayHasKey('revision_id', $error->get_error_data()['fields']);
+    }
+
+    public function testAMissedScheduleIsRefusedBecauseRestoringWouldPublish(): void
+    {
+        $current = array_merge(self::CURRENT_POST, [
+            'post_status' => 'future',
+            'post_date_gmt' => gmdate('Y-m-d H:i:s', time() - 600),
+        ]);
+        Functions\when('get_post')->alias(static fn (int $id) => match ($id) {
+            810 => new WP_Post(['ID' => 810, 'post_type' => 'revision', 'post_parent' => 5]),
+            5 => new WP_Post($current),
+            default => null,
+        });
+        Functions\expect('wp_save_post_revision')->never();
+        Functions\expect('wp_restore_post_revision')->never();
+
+        $error = $this->ability(Mockery::mock(ChangeLog::class))->execute([
+            'revision_id' => 810,
+            'rev' => Rev::ofPost(new WP_Post($current)),
+            'confirm' => true,
+        ]);
+
+        self::assertSame('lit_validation_failed', $error->get_error_code());
+        self::assertStringContainsString('lit-post-publish', $error->get_error_data()['hint']);
+    }
+
     public function testMissingOrStaleRevIsRevMismatch(): void
     {
         Functions\expect('wp_restore_post_revision')->never();