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.

app/logging.py

@@ -1,27 +1,27 @@
 import json
 import logging
-from datetime import UTC, datetime
+from datetime import datetime, timezone
 from typing import Any
 
 
 class JsonFormatter(logging.Formatter):
     def format(self, record: logging.LogRecord) -> str:
-        payload: dict[str, Any] = {
-            "timestamp": datetime.now(UTC).isoformat(),
+        data: dict[str, Any] = {
+            "timestamp": datetime.now(timezone.utc).isoformat(),
             "level": record.levelname,
             "logger": record.name,
             "message": record.getMessage(),
         }
-        for key in ("event", "monitor_id", "url", "state", "latency_ms", "status_code"):
+        for key in ("event", "monitor_id", "url", "outcome", "error_code", "latency_ms"):
             value = getattr(record, key, None)
             if value is not None:
-                payload[key] = value
-        return json.dumps(payload, default=str)
+                data[key] = value
+        return json.dumps(data, separators=(",", ":"), default=str)
 
 
 def configure_logging(level: str) -> None:
     handler = logging.StreamHandler()
     handler.setFormatter(JsonFormatter())
     root = logging.getLogger()
-    root.handlers = [handler]
+    root.handlers[:] = [handler]
     root.setLevel(level.upper())