feat(devboxes): use optimistic create endpoint

[adam-rl]

User description

Summary

• use the optimistic devbox create endpoint inside createAndAwaitRunning
• return immediately when the server observes running
• retain the existing long-poll fallback for transitional responses
• keep the raw endpoint out of the generated public API surface

Testing

• yarn lint
• focused createAndAwaitRunning Jest tests

Depends on runloopai/runloop#10859.

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CodeAnt-AI Description

Create devboxes through the optimistic endpoint and return running instances immediately

What Changed

• Devbox creation now uses the endpoint that can return an already-running devbox
• Running devboxes are returned immediately without an extra status wait
• Devboxes still wait for running, failure, or shutdown when creation is still in progress
• Added coverage for immediate responses and creation failures

Impact

✅ Faster access to ready devboxes
✅ Fewer unnecessary status checks
✅ Preserved waiting behavior for provisioning devboxes

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🤖 CodeAnt AI — Review Status

Status	Commit	Started (UTC)	Finished (UTC)
✅ Reviewed your PR	d132f63	Aug 14, 2026 · 00:16	00:18

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