Keep commands running across Hypeman reconnects

[rgarcia]

Summary

• add an opt-in DurableHypemanEnvironment that launches commands as detached jobs inside the VM
• replace long-lived control-plane exec streams with short status polls that reconnect after transient interruptions
• preserve command output, exit codes, timeouts, user/cwd/env handling, and cleanup while leaving the existing environment behavior unchanged

Why

Long-running agents currently depend on one WebSocket for their full execution. A temporary control-plane restart closes that stream even though the VM and command can continue running. Durable execution keeps command lifetime independent from the control connection.

Testing

• uv run ruff format --check .
• uv run ruff check .
• uv run pytest -q
• uv run ty check
• uv build
• real VM integration covering detached execution, simulated control interruption, reconnection, result collection, and deletion

[cursor]

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