feat(stats): add live-action library support and harden stats runtime

- Add TMDB metadata, linking, filtering, and live-action library merging
- Harden stats request validation, lifecycle handling, and compiled runtime coverage
- Fix Anki media synchronization and configuration validation

src/config/settings/registry.test.ts

@@ -290,6 +290,9 @@ test('settings registry routes playback-related integrations into integrations',
   assert.equal(field('subsync.replace').section, 'Subtitle Sync');
   assert.equal(field('tsukihime.apiBaseUrl').category, 'integrations');
   assert.equal(field('tsukihime.apiBaseUrl').section, 'TsukiHime');
+  assert.equal(field('tmdb.apiKey').category, 'integrations');
+  assert.equal(field('tmdb.apiKey').section, 'TMDB');
+  assert.equal(field('tmdb.apiKey').secret, true);
 });
 
 test('settings registry puts feature toggles first, then other toggles alphabetically', () => {
@@ -379,6 +382,7 @@ test('settings registry marks safe live config paths as hot-reloadable', () => {
     'ankiConnect.nPlusOne.minSentenceWords',
     'ankiConnect.fields.word',
     'ankiConnect.fields.audio',
+    'ankiConnect.fields.wordAudio',
     'ankiConnect.fields.image',
     'ankiConnect.fields.sentence',
     'ankiConnect.fields.miscInfo',