pydantic

Temporary: use `pdm` v2.17.3 to unblock CI failures (#10134)

Performance boost: skip caching parent namespaces in most cases (#10113)

Do not compute JSON Schema default when plain serializers are used with `when_used` set to `'json-unless-none'` and the default value is `None` (#10121)

Add warning for double `frozen` config setting on dataclass (#10126)

Revert "Experimental feature: opt-in fast build (#10064)" (#10127)