refactor: make method and path in http_server_request protected instead of private

[garder500]

Putting path and request_type to protected (making them available to retrieve in case of handle other request type than "POST")

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[Jaskowicz1]

@braindigitalis shouldn't the title should be refactor instead of feat?

[braindigitalis]

looks good, we will merge to dev as soon as ci finishes, thanks for your first contribution!