feat(wire): add moderation and builtin hooks to post service wiring

Add wire providers for ModerationHooks and BuiltinHooks, injecting them
into PostService via dependency injection. Hooks are passed as blank
identifiers to trigger their initialization and registration side effects.

internal/wire/service.go

@@ -111,6 +111,8 @@ func ProvidePostService(
 	cacheBackend cache.Cache,
 	txManager repository.TransactionManager,
 	hookManager *hook.Manager,
+	_ *hook.ModerationHooks,
+	_ *hook.BuiltinHooks,
 ) service.PostService {
 	return service.NewPostService(postRepo, systemMessageService, gorseClient, postAIService, cacheBackend, txManager, hookManager)
 }