chore: minor cleanup, healthcheck

tests/test_server_unit.py

@@ -34,8 +34,8 @@ class FakeProvider(Provider):
     def prepare_threshold(self) -> int:
         return self._prepare_threshold
 
-    def should_prepare_standby(self, usage_percent: int) -> bool:
-        return usage_percent >= self.prepare_threshold
+    def should_prepare_standby(self) -> bool:
+        return False
 
     @property
     def name(self) -> str:
@@ -113,6 +113,12 @@ def test_token_handler_unknown_provider(monkeypatch):
     assert resp.status == 404
 
 
+def test_health_handler_ok():
+    resp = asyncio.run(server.health_handler(object()))
+    assert resp.status == 200
+    assert resp.text == "ok"
+
+
 def test_token_handler_success(monkeypatch):
     provider = FakeProvider()
     monkeypatch.setattr(server, "PROVIDERS", {"fake": provider})