fix: show technical timestamps in tooltips

central/app/control_plane.py

@@ -24,7 +24,10 @@ def _page(page: int, page_size: int):
 
 
 def _iso(value):
-    return value.isoformat() if value else None
+    if value is None:
+        return None
+    value = value.replace(tzinfo=timezone.utc) if value.tzinfo is None else value.astimezone(timezone.utc)
+    return value.isoformat()
 
 
 def _utc_now(value=None):