Ignore ruff UP045

pyproject.toml

@@ -235,6 +235,7 @@ ignore = [
   "SIM117",   # forbids nested with statements
   "C400",     # wants to unnecessarily force use of list comprehension
   "UP037",    # can incorrectly (!) convert quoted type to unquoted type, causing an error
+  "UP045",    # imposes T | None instead of Optional[T]
 ]
 unfixable = ["F841", "F601", "F602", "B018"]
 extend-fixable = ["F401", "B905", "W291"]