Type fix: HTTPInput.Headers unexpected type Dict[str,List[str]]

[xeviknal-cf]

Hello,

Shouldn't HTTP Headers be a dict[str, str] instead of [str, List[str]]?

Orkes UI also complains about this:

And I receive this headers:

Either the issue is in the typing or marshalling the data.

[xeviknal-cf]

cc @IgorChvyrov-sm @nthmost-orkes

[am-orkes]

This could break backward compatibility for clients that already use this. I would recommend setting it up as

headers: Optional[dict[str, str|list[str]]]

and then on line 59
self._headers = ",".join(headers) if isinstance(headers, list) else headers

perhaps?

This will not work for Set-Cookie headers as the separators are semi-colons, something that likely should be handled with another parameter.

[am-orkes]

Same comment as above.