Add wait_for_finish to RunClient.get and BuildClient.get #1176

RunClient.get and BuildClient.get take only timeout (run.py#L62-L76, build.py#L38-L52). The API's waitForFinish query parameter (up to 60 s server-side) is reachable only through wait_for_finish(), which loops until the job is terminal, or through ActorClient.build(wait_for_finish=...) at creation time.

The JS client accepts get({ waitForFinish }) on both (run.ts#L116-L125, build.ts#L71-L80) and extends the request timeout to cover the wait.

Expected behavior

get(*, wait_for_finish: timedelta | None = None, timeout=...) on RunClient, BuildClient and their async variants, sending waitForFinish in seconds and making sure the request timeout is at least the wait.

✍️ Drafted by Claude Code