Store-level: assert findLatestContentHashForAppRoute picks the newest
hash across publishing instances (proves the lookup survives agent
removal), isolates by (app, env), and returns empty for blank inputs.
Controller-level: assert the env-scoped /routes/{routeId}/diagram
endpoint resolves without a registry prerequisite, 404s for unknown
routes, and that an execution's stored diagramContentHash stays pinned
to the point-in-time version after a newer diagram is stored — the
"latest" endpoint flips to v2, the by-hash render remains byte-stable.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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