first commit

exectrace/utils/time_utils.py

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+from __future__ import annotations
+
+from datetime import datetime, timezone
+
+
+ISO_FORMAT = "%Y-%m-%dT%H:%M:%S.%fZ"
+
+
+def utc_now_iso() -> str:
+    """Return a UTC timestamp in ISO-8601 format."""
+    return datetime.now(tz=timezone.utc).strftime(ISO_FORMAT)