v0.3.5 — upgrades reach every sandbox; provider errors fail fast

What's Changed

• fix: self-healing start — recreate sandboxes whose container is stale or missing by @tastyeffectco in #97
• fix(authproxy): fail fast with the provider's real message instead of a timeout by @tastyeffectco in #98

Full Changelog: v0.3.4...v0.3.5