[Python] Release 0.58.1

Fixed

• Crash in canonical.json.to_string on free-threaded Python when another thread resized a list or dict. #1664
• Crash when an Enum member's value override, a custom keyword or a custom format emptied a list or dict holding the instance being read, during validation, schema conversion or canonical.json.to_string.

Performance

• uri and uri-reference formats check the syntax directly instead of parsing each value into a URI.
• Enum members read their stored value directly instead of calling the value property.