[TSP] Pyrefly: completions on an Enum class omit the declared members and Enum API (click ParameterSource)

[TSP] Found via differential testing comparing Pylance's built-in Pyright analyzer against [Pyrefly](https://github.com/facebook/pyrefly) running as an external type server over the Type Server Protocol (TSP). ## Summary Member-access completions on an **`enum.Enum` subclass accessed as a class** are missing the declared enum members and the `Enum`/`EnumMeta` API surface under Pyrefly. Completing after `ParameterSource.` returns **24** items vs **68** from Pylance's built-in analyzer. Every Pyrefly item is also returned by the built-in analyzer (strict subset), and the **44 missing items include the five actual enum members** (`COMMANDLINE`, `DEFAULT`, `DEFAULT_MAP`, `ENVIRONMENT`, `PROMPT`). ## Repro 1. `git clone https://github.com/pallets/click.git` 2. `git checkout 874ca2bc1c30d93a4ac6e36a15ed685eafe89097` (8.1.7) 3. Create a venv and `pip install -e .` 4. Open `src/click/core.py`. 5. Trigger completions immediately after `ParameterSource.`, e.g. on the line: ```py source = ParameterSource.COMMANDLINE ``` (`ParameterSource` is `class ParameterSource(enum.Enum)`.) To switch backends: set `python.analysis.typeServerExecutable` to the Pyrefly binary to get the Pyrefly result; leave it unset to get the built-in (Pyright) result. ## Expected (Pylance / built-in Pyright) 68 completion items, including the declared enum members and the Enum API. ## Actual (Pyrefly over TSP) 24 completion items (only generic `object`/`type` dunders). The following **44 members are missing**, including the actual enum members and the `Enum`/`EnumMeta` surface: ``` __annotations__, __base__, __bases__, __basicsize__, __bool__, __call__, __contains__, __copy__, __deepcopy__, __delattr__, __dict__, __dictoffset__, __dir__, __doc__, __eq__, __flags__, __format__, __getattribute__, __getitem__, __getstate__, __hash__, __init__, __init_subclass__, __instancecheck__, __itemsize__, __iter__, __len__, __members__, __module__, __mro__, __name__, __ne__, __new__, __or__, __order__, __prepare__, __qualname__, __reduce__, __reduce_ex__, __repr__, __reversed__, __ror__, __setattr__, __sizeof__, __str__, __subclasscheck__, __subclasses__, __subclasshook__, __text_signature__, __weakrefoffset__, _generate_next_value_, _ignore_, _member_map_, _member_names_, _missing_, _name_, _order_, _value_, _value2member_map_, COMMANDLINE, DEFAULT, DEFAULT_MAP, ENVIRONMENT, PROMPT, mro, name, value ``` The most user-visible gap is that the enum's own members (`COMMANDLINE`, `DEFAULT`, `DEFAULT_MAP`, `ENVIRONMENT`, `PROMPT`) and the common Enum API (`name`, `value`, `__members__`) are not offered. ## Environment - Pyrefly: `pyrefly 1.1.1` - `python.analysis` Python version: 3.11 - OS: Windows