Closes a 4+ cycle Canvas tabs E2E flake pattern that's been blocking
staging→main PRs since 2026-04-24+ (#2096, #2094, #2055, #2079, ...).
Root cause: TLS_TIMEOUT_MS=180s (3 min) is too tight for the layered
realities of staging tenant TLS readiness:
1. Cloudflare DNS propagation through the edge (1-2 min typical)
2. Tenant CF Tunnel registering the new hostname (1-2 min)
3. CF edge ACME cert provisioning + cache (1-3 min)
Each layer can add 1-3 min on its own under heavy staging load — the
realistic worst case is well past the 3-min cap.
Provision and workspace-online timeouts were already raised to 20 min
(staging-setup.ts:42-46 history). The TLS gate was the remaining
under-budgeted step. Bumping to 10 min keeps it inside the 20-min
PROVISION envelope so a genuinely-stuck tenant still fails loud at
the earlier provision step rather than masquerading as a TLS issue.
Both call sites raised together:
- canvas/e2e/staging-setup.ts: TLS_TIMEOUT_MS = 10 * 60 * 1000
- tests/e2e/test_staging_full_saas.sh: TLS_DEADLINE += 600
Each carries an inline rationale comment so the next reviewer sees
the layer-by-layer decomposition without re-reading the issue thread.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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