Apply two new ruff linter rules

pyproject.toml

@@ -10,8 +10,6 @@ ignore = [
   "D401",  # TODO: many strings need rephrasing
   "T201",  # WONTFIX: using print() (maybe add noqa)
   "TRY003",  # WONTFIX: Avoid specifying long messages outside the exception class
-  "TRY200",  # TODO: Use `raise from` to specify exception cause
-  "B904",  # TODO: Within an `except` clause, raise exceptions with `raise ... from err` or `raise ... from None` to distinguish them from errors in exception handling
   "PLR0913",  # WONTFIX: Too many arguments to function call
   "PLR2004",  # TODO: Magic value used in comparison, consider replacing 201 with a constant variable
   "N818"  # TODO: exception naming