feat(status): add 3-second in-memory cache to throttle DB status inquiries

[AugistineCreates]

This pr closes #359

This PR implements a lightweight caching interceptor layer directly inside the system status route to resolve this.

Technical Changes

• Status Endpoint Interceptor (src/routes/status.ts):
  • Introduced a localized in-memory cache (statusCache) with a TTL of 3000ms.
  • When a status inquiry request is received, it checks if cached data is present and within the 3000ms window.
  • If valid, the endpoint serves the cached data immediately without executing any database/Prisma operations.
  • If expired (or not yet initialized), the endpoint performs the database query (prisma.$queryRaw and prisma.priceHistory.findFirst), updates the memory cache with the new status data and timestamp, and returns the response.

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