Remove legacy container and GitLab scaffolding and add ruff and pyright checks.

tests/test_auth.py

@@ -1,4 +1,5 @@
 from fastapi.testclient import TestClient
+from pydantic import SecretStr
 from tailscalesd.main import Settings, app, get_settings
 
 client = TestClient(app)
@@ -8,9 +9,9 @@ def get_settings_override() -> Settings:
     return Settings(
         test_mode=True,
         tailnet="test",
-        client_id="test",
-        client_secret="test",
-        bearer_token="test",
+        client_id=SecretStr("test"),
+        client_secret=SecretStr("test"),
+        bearer_token=SecretStr("test"),
     )