WIP: Spike store cv value for nxt 601

[dalecreativ]

Purpose

This spike explores caching the Storyblok cv (cache version) value locally in memory to avoid unnecessary calls to the spaces/me endpoint on every request, improving efficiency and enabling Ocelot to cache responses consistently (avoiding redirects caused by stale cv)

Work so far:

• Introduced a new getCachedCv() function that:
  • Returns a locally cached cv if it’s within a configurable TTL (longTTL)
  • Falls back to calling fetchCacheVersion() if stale or missing
• Updated fetchStory() to use getCachedCv() instead of always calling fetchCacheVersion()
• Preserved existing Storyblok SDK integration (getStoryblokApi)
• Added logger.info and logger.warn messages to track:
  • When the cached value is reused
  • When a new value is fetched
• Ensured fetchCacheVersion() is still the single source of truth for interacting with the spaces/me endpoint