Include timeout because sometimes it takes too long

[shelbaz]

No description provided.

[AnderRV]

Thanks for this! Revisiting after a broader Fetch/Extract/Batch rework this session — a couple of things changed underneath this PR:

• The premise ("timeout because sometimes it takes too long") is stale: client.py now forwards arbitrary **kwargs (including timeout=) straight to the underlying requests call, so a per-call timeout already works today without a code change.
• What this PR actually adds beyond that — a constructor-level default timeout (so a call that doesn't pass one explicitly still doesn't hang forever) — is still a real, valid gap. It's just tangled up here with unrelated reformatting, and conflicts against current main.

Going to close this one rather than merge as-is, but the default-timeout idea is worth a fresh, small PR against the current client.py if you'd like to take another pass — happy to help scope it. Take into account that fetch requests can run up to 180 seconds. Adding a default timeout below that could cause issues for long lasting requests.