PR that allows you to pass `proxy` (of the type ProxyTypes) when calling
methods in the SDK that send requests. Also, if you pass `proxy` when
creating a sandbox, all the sandbox requests (called on the
Sandbox/AsyncSandbox instance) will automatically use the same proxy.
The PR also contains a small bugfix—adding missing passing of limits and
passing these directly instead of through transport to be able to pass
the proxy parameter properly.
This change should also be compatible with the code interpreter—it uses
the client transport, which uses the passed proxy if there is any.
Tomas Valenta
74ff53c3bb