Matches tests/e2e/test_staging_full_saas.sh's 20-min budget (#1930).
Canvas E2E was still stuck at 900s (15 min) which regularly flakes on
tenant cold boots in 12-15 min range — especially on staging where
workspace-server image pulls + AMI bootstrapping add 3-5 min vs prod.
Concrete blocker: 2026-04-24 staging→main sync (#1981) kept failing on
"tenant provision: timed out after 900s" in canvas/e2e/staging-setup.ts
despite the actual sync E2E going green. Canvas-side timeout was
strictly tighter than the sync-side timeout.
Also raises WORKSPACE_ONLINE_TIMEOUT_MS to 20 min to cover the case
where the workspace EC2 is provisioned but hermes cold-install (apt +
uv + hermes-agent clone + gateway boot) takes longer than the original
10-min budget — matches the 20-min workspace deadline in SaaS E2E.
No behavior change when things are fast. Just covers the tail.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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