decomposer: generate deliverable files for Define the service contract and project architecture for the FastAPI endpoint monitoring service.; Implement the typed monitor CRUD API and concurrency-safe in-memory state according to the service design.; Implement secure on-demand endpoint checks with status updates, latency measurement, robust error handling, and redacted structured logs.; Add operational API endpoints and environment-driven runtime configuration to the monitoring service.; Create automated tests for the monitoring service.; Package the service with Docker and developer documentation.; Validate the complete project.

tests/test_store.py

@@ -1,15 +1,22 @@
+import asyncio
+
 import pytest
 
-from app.models import CheckResult, MonitorCreate, MonitorStatus, utcnow
+from app.models import CurrentStatus, MonitorCreate, MonitorState
 from app.store import MonitorStore
 
-pytestmark = pytest.mark.anyio
 
-
-async def test_deleted_monitor_is_not_resurrected_by_late_result():
+@pytest.mark.anyio
+async def test_concurrent_status_updates_are_valid() -> None:
     store = MonitorStore()
-    item = await store.create(MonitorCreate(name="x", url="https://example.com"))
-    assert await store.delete(item.id)
-    result = CheckResult(status=MonitorStatus.up, checked_at=utcnow(), latency_ms=1, http_status=200)
-    assert await store.record(item.id, result) is None
-    assert await store.get(item.id) is None
+    monitor = await store.create(MonitorCreate(name="x", target_url="https://example.com"))
+
+    async def set_one(code: int) -> None:
+        await store.set_status(
+            monitor.id,
+            CurrentStatus(state=MonitorState.UP, latency_ms=1, http_status=code),
+        )
+
+    await asyncio.gather(*(set_one(code) for code in range(200, 210)))
+    saved = await store.get(monitor.id)
+    assert saved.current_status.http_status in range(200, 210)