fix(tg): QA fixes — stream_message, topic_created, archive reply

- sdk/mock.py: stream_message was async def (coroutine), must be async
  generator with yield — caused TypeError on every user message
- topic_events.py: on_topic_created now skips bot-created topics
  (from_user.id == bot.id); cmd_new already registers them under the
  correct human user_id
- commands.py: cmd_archive now sends "Чат архивирован." confirmation
- test_topic_events.py: add bot=SimpleNamespace(id=BOT_ID) to fixture

tests/adapter/telegram/test_topic_events.py

@@ -16,6 +16,9 @@ def fresh_db(tmp_path, monkeypatch):
     return db_mod
 
 
+BOT_ID = 9999  # distinct from any test user_id
+
+
 def make_service_message(*, user_id=1, thread_id=42, topic_name="Мой чат"):
     m = SimpleNamespace()
     m.message_thread_id = thread_id
@@ -25,6 +28,7 @@ def make_service_message(*, user_id=1, thread_id=42, topic_name="Мой чат")
     m.forum_topic_edited = SimpleNamespace(name="Новое имя")
     m.forum_topic_closed = SimpleNamespace()
     m.answer = AsyncMock()
+    m.bot = SimpleNamespace(id=BOT_ID)
     return m