feat: geo location as Google Maps link in Telegram notifications

When signal has geo, show clickable Google Maps link instead of raw
coordinates. Without geo, show "Гео нету". Added parse_mode=HTML
to send_message for link rendering.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/test_arch_002.py

@@ -119,7 +119,7 @@ async def test_signal_message_contains_registered_username():
 
 @pytest.mark.asyncio
 async def test_signal_message_without_geo_contains_bez_geolocatsii():
-    """When geo is None, message must contain 'Без геолокации'."""
+    """When geo is None, message must contain 'Гео нету'."""
     async with make_app_client() as client:
         api_key = await _register(client, _UUID_S3, "Bob")
         with patch("backend.telegram.send_message", new_callable=AsyncMock) as mock_send:
@@ -129,7 +129,7 @@ async def test_signal_message_without_geo_contains_bez_geolocatsii():
                 headers={"Authorization": f"Bearer {api_key}"},
             )
             text = mock_send.call_args[0][0]
-    assert "Без геолокации" in text
+    assert "Гео нету" in text
 
 
 @pytest.mark.asyncio