KV Value Update handles Data wrongly

从 values.update() 和 metadata.get() 入口点开始，检查 value、metadata 和 Content-Type 的发送方式。使用两个字段重现请求，然后为预期的 metadata 行为添加回归测试。当 metadata 被单独存储且 values.get() 不再将其作为 value 的一部分返回时，即表示完成。

Confirm this is a Python library issue and not an underlying Cloudflare API issue.

• This is an issue with the Python library

Describe the bug

When trying to set a value in the KV Store metadata needs to be provided, but gets merged into the value and no meta data gets set.

In [29]: response = client.kv.namespaces.values.update(key_name="test", value="MY VALUE", metadata="{}", **kv.params)

In [30]: print(client.kv.namespaces.values.get(key_name="test",  **kv.params).text())
{"metadata":"{}","value":"MY VALUE"}

In [31]: print(client.kv.namespaces.metadata.get(key_name="test",  **kv.params) is None)
True

The problem seems to be caused from the whole body of the request being used as the actual value. The behaviour seems to be correct when manually specifying the request's content tye as multipart/form-data:

In [38]: response = client.kv.namespaces.values.update(key_name="test", value="MY VALUE", metadata="{}", **kv.params, extra_headers={"Content-Type": "multipart/form-data"})

In [39]: print(client.kv.namespaces.values.get(key_name="test",  **kv.params).text())
MY VALUE

In [40]: print(client.kv.namespaces.metadata.get(key_name="test",  **kv.params))
{}

This should probably be the default behaviour as it shouldn't be necessary to explicitly override the content type. On the other hand metadata should not be required in which case the whole body could be set as value

To Reproduce

1. Call values.update() with a value and metadata. Both are set as the actual value.
2. metadata.get() doesn't return any metadata.
3. Metadata is returned with the value upon calling values.get().

Code snippets

OS

Every OS

Python version

3.12

Library version

v4.0.0