No Protection on enum values as function input

Currently with code like the following:

---@enum TestEnum
TestEnum = {
	ONE = "ONE",
	TWO = "TWO",
	THREE = "THREE",
}

---@param test_enum TestEnum
local function test(test_enum)
	print(test_enum)
end

test(TestEnum.ONE) --- CORRECT: No error
test("ONE") --- CORRECT: No error
test(TestEnum.FOUR) --- INCORRECT: No error
test("FOUR") --- CORRECT: Error

There is no intellisense error for test(TestEnum.FOUR) like there is for test("FOUR")

It would be nice to get an error if you are trying to use a non-existing enum value (I have run into problems relating to this 😞) similarly if you are trying to use a string literal which doesn't match the enum.

I think this might be related to a wider issue where inputs to functions can be of type unknown even with the no-unknown setting.

使用提供的 enum 和函数示例作为复现，比较 TestEnum.FOUR 和 "FOUR" 的诊断结果。跟踪 language server 对 enum 和函数参数的类型检查，然后为两次调用添加覆盖；当无效的 enum 成员与无效的字符串字面量得到一致诊断时即可完成。